| Base | Representation |
|---|---|
| bin | 100100001101110… |
| … | …1011001010010000 |
| 3 | 10010200122021112020 |
| 4 | 1020123223022100 |
| 5 | 4442043323344 |
| 6 | 320330131440 |
| 7 | 42054102420 |
| oct | 11033531220 |
| 9 | 3120567466 |
| 10 | 1215214224 |
| 11 | 573a58484 |
| 12 | 29ab80b80 |
| 13 | 1649c0493 |
| 14 | b7570480 |
| 15 | 71a43719 |
| hex | 486eb290 |
1215214224 has 80 divisors (see below), whose sum is σ = 3623399040. Its totient is φ = 343756800.
The previous prime is 1215214219. The next prime is 1215214237. The reversal of 1215214224 is 4224125121.
It is a super-2 number, since 2×12152142242 = 2953491220423844352, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (24).
It is a junction number, because it is equal to n+sod(n) for n = 1215214194 and 1215214203.
It is an unprimeable number.
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 15 ways as a sum of consecutive naturals, for example, 16032 + ... + 51840.
It is an arithmetic number, because the mean of its divisors is an integer number (45292488).
Almost surely, 21215214224 is an apocalyptic number.
1215214224 is a gapful number since it is divisible by the number (14) 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 1215214224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811699520).
1215214224 is an abundant number, since it is smaller than the sum of its proper divisors (2408184816).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1215214224 is a wasteful number, since it uses less digits than its factorization.
1215214224 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 35928 (or 35922 counting only the distinct ones).
The product of its digits is 1280, while the sum is 24.
The square root of 1215214224 is about 34859.9228914810. The cubic root of 1215214224 is about 1067.1307013991.
Adding to 1215214224 its reverse (4224125121), we get a palindrome (5439339345).
The spelling of 1215214224 in words is "one billion, two hundred fifteen million, two hundred fourteen thousand, two hundred twenty-four".
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