15312122252 has 12 divisors (see below), whose sum is σ = 30624244560. Its totient is φ = 6562338096.

The previous prime is 15312122219. The next prime is 15312122269. The reversal of 15312122252 is 25222121351.

It is a happy number.

15312122252 is an admirable number.

It is a super-2 number, since 2×15312122252² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273430727 + ... + 273430782.

It is an arithmetic number, because the mean of its divisors is an integer number (2552020380).

Almost surely, 2^15312122252 is an apocalyptic number.

It is an amenable number.

15312122252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15312122252 is a wasteful number, since it uses less digits than its factorization.

15312122252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546861520 (or 546861518 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

Subtracting 15312122252 from its reverse (25222121351), we obtain a palindrome (9909999099).

The spelling of 15312122252 in words is "fifteen billion, three hundred twelve million, one hundred twenty-two thousand, two hundred fifty-two".