131262805525 has 24 divisors (see below), whose sum is σ = 163869153320. Its totient is φ = 104299004160.

The previous prime is 131262805511. The next prime is 131262805529. The reversal of 131262805525 is 525508262131.

It can be written as a sum of positive squares in 12 ways, for example, as 60237357489 + 71025448036 = 245433^2 + 266506^2 .

It is not a de Polignac number, because 131262805525 - 2⁹ = 131262805013 is a prime.

It is a super-2 number, since 2×131262805525² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131262805529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12668647 + ... + 12679003.

Almost surely, 2^131262805525 is an apocalyptic number.

It is an amenable number.

131262805525 is a deficient number, since it is larger than the sum of its proper divisors (32606347795).

131262805525 is a wasteful number, since it uses less digits than its factorization.

131262805525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13753 (or 13748 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 131262805525 in words is "one hundred thirty-one billion, two hundred sixty-two million, eight hundred five thousand, five hundred twenty-five".