| Base | Representation |
|---|---|
| bin | 1000010000001111… |
| … | …1000101000111100 |
| 3 | 12201102001200211110 |
| 4 | 2010003320220330 |
| 5 | 14014144022230 |
| 6 | 1003504122020 |
| 7 | 105622245054 |
| oct | 20403705074 |
| 9 | 5642050743 |
| 10 | 2215610940 |
| 11 | a37722324 |
| 12 | 51a006310 |
| 13 | 2940390ba |
| 14 | 170382564 |
| 15 | ce7a24b0 |
| hex | 840f8a3c |
2215610940 has 96 divisors (see below), whose sum is σ = 6415718400. Its totient is φ = 570974976.
The previous prime is 2215610939. The next prime is 2215610941. The reversal of 2215610940 is 490165122.
It is an interprime number because it is at equal distance from previous prime (2215610939) and next prime (2215610941).
It is a Harshad number since it is a multiple of its sum of digits (30).
It is a junction number, because it is equal to n+sod(n) for n = 2215610898 and 2215610907.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2215610941) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207861 + ... + 218259.
It is an arithmetic number, because the mean of its divisors is an integer number (66830400).
Almost surely, 22215610940 is an apocalyptic number.
2215610940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2215610940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3207859200).
2215610940 is an abundant number, since it is smaller than the sum of its proper divisors (4200107460).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2215610940 is a wasteful number, since it uses less digits than its factorization.
2215610940 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 10531 (or 10529 counting only the distinct ones).
The product of its (nonzero) digits is 4320, while the sum is 30.
The square root of 2215610940 is about 47070.2766084925. The cubic root of 2215610940 is about 1303.6604801586.
The spelling of 2215610940 in words is "two billion, two hundred fifteen million, six hundred ten thousand, nine hundred forty".
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