13515231325 has 12 divisors (see below), whose sum is σ = 16761432160. Its totient is φ = 10810542960.

The previous prime is 13515231287. The next prime is 13515231329. The reversal of 13515231325 is 52313251531.

It is not a de Polignac number, because 13515231325 - 2²⁹ = 12978360413 is a prime.

It is a super-2 number, since 2×13515231325² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13515231329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143032 + ... + 217918.

Almost surely, 2^13515231325 is an apocalyptic number.

It is an amenable number.

13515231325 is a deficient number, since it is larger than the sum of its proper divisors (3246200835).

13515231325 is an equidigital number, since it uses as much as digits as its factorization.

13515231325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82116 (or 82111 counting only the distinct ones).

The product of its digits is 13500, while the sum is 31.

Adding to 13515231325 its reverse (52313251531), we get a palindrome (65828482856).

The spelling of 13515231325 in words is "thirteen billion, five hundred fifteen million, two hundred thirty-one thousand, three hundred twenty-five".