131512340502 has 20 divisors (see below), whose sum is σ = 294685059636. Its totient is φ = 43837446780.

The previous prime is 131512340473. The next prime is 131512340537. The reversal of 131512340502 is 205043215131.

131512340502 is a `hidden beast` number, since 1 + 3 + 151 + 2 + 3 + 4 + 0 + 502 = 666.

It is a super-2 number, since 2×131512340502² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 405902124 + ... + 405902447.

Almost surely, 2^131512340502 is an apocalyptic number.

131512340502 is an abundant number, since it is smaller than the sum of its proper divisors (163172719134).

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

131512340502 is an equidigital number, since it uses as much as digits as its factorization.

131512340502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811804585 (or 811804576 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 131512340502 its reverse (205043215131), we get a palindrome (336555555633).

The spelling of 131512340502 in words is "one hundred thirty-one billion, five hundred twelve million, three hundred forty thousand, five hundred two".