131031525505 has 16 divisors (see below), whose sum is σ = 157564845648. Its totient is φ = 104607360000.

The previous prime is 131031525487. The next prime is 131031525511. The reversal of 131031525505 is 505525130131.

It can be written as a sum of positive squares in 8 ways, for example, as 11553455169 + 119478070336 = 107487^2 + 345656^2 .

It is not a de Polignac number, because 131031525505 - 2⁵ = 131031525473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8589685 + ... + 8604925.

It is an arithmetic number, because the mean of its divisors is an integer number (9847802853).

Almost surely, 2^131031525505 is an apocalyptic number.

It is an amenable number.

131031525505 is a deficient number, since it is larger than the sum of its proper divisors (26533320143).

131031525505 is a wasteful number, since it uses less digits than its factorization.

131031525505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18708.

The product of its (nonzero) digits is 11250, while the sum is 31.

Adding to 131031525505 its reverse (505525130131), we get a palindrome (636556655636).

The spelling of 131031525505 in words is "one hundred thirty-one billion, thirty-one million, five hundred twenty-five thousand, five hundred five".