| Base | Representation |
|---|---|
| bin | 1000000010010111… |
| … | …1100010101000110 |
| 3 | 12120100120210201000 |
| 4 | 2000211330111012 |
| 5 | 13404300230321 |
| 6 | 554025114130 |
| 7 | 104314565430 |
| oct | 20045742506 |
| 9 | 5510523630 |
| 10 | 2157430086 |
| 11 | a078a4179 |
| 12 | 502628946 |
| 13 | 284c78166 |
| 14 | 166759650 |
| 15 | c960d826 |
| hex | 8097c546 |
2157430086 has 128 divisors (see below), whose sum is σ = 5669637120. Its totient is φ = 595296000.
The previous prime is 2157430063. The next prime is 2157430087. The reversal of 2157430086 is 6800347512.
2157430086 is a `hidden beast` number, since 2 + 1 + 574 + 3 + 0 + 0 + 86 = 666.
It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.
It is a self number, because there is not a number n which added to its sum of digits gives 2157430086.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2157430087) 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 63 ways as a sum of consecutive naturals, for example, 1657636 + ... + 1658936.
It is an arithmetic number, because the mean of its divisors is an integer number (44294040).
Almost surely, 22157430086 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 2157430086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2834818560).
2157430086 is an abundant number, since it is smaller than the sum of its proper divisors (3512207034).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2157430086 is a wasteful number, since it uses less digits than its factorization.
2157430086 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1467 (or 1461 counting only the distinct ones).
The product of its (nonzero) digits is 40320, while the sum is 36.
The square root of 2157430086 is about 46448.1440533419. The cubic root of 2157430086 is about 1292.1479520619.
Adding to 2157430086 its reverse (6800347512), we get a palindrome (8957777598).
The spelling of 2157430086 in words is "two billion, one hundred fifty-seven million, four hundred thirty thousand, eighty-six".
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