15115252331 has 12 divisors (see below), whose sum is σ = 15578368680. Its totient is φ = 14657175840.

The previous prime is 15115252319. The next prime is 15115252367. The reversal of 15115252331 is 13325251151.

15115252331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-15115252331 is a prime.

It is a super-2 number, since 2×15115252331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15115252294 and 15115252303.

It is not an unprimeable number, because it can be changed into a prime (15115252231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1136840 + ... + 1150058.

It is an arithmetic number, because the mean of its divisors is an integer number (1298197390).

Almost surely, 2^15115252331 is an apocalyptic number.

15115252331 is a deficient number, since it is larger than the sum of its proper divisors (463116349).

15115252331 is an equidigital number, since it uses as much as digits as its factorization.

15115252331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13594 (or 13427 counting only the distinct ones).

The product of its digits is 4500, while the sum is 29.

The spelling of 15115252331 in words is "fifteen billion, one hundred fifteen million, two hundred fifty-two thousand, three hundred thirty-one".