131531484865 has 24 divisors (see below), whose sum is σ = 173514678120. Its totient is φ = 95646270720.

The previous prime is 131531484827. The next prime is 131531484871. The reversal of 131531484865 is 568484135131.

It can be written as a sum of positive squares in 4 ways, for example, as 12313897024 + 119217587841 = 110968^2 + 345279^2 .

It is not a de Polignac number, because 131531484865 - 2¹³ = 131531476673 is a prime.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8479797 + ... + 8495293.

It is an arithmetic number, because the mean of its divisors is an integer number (7229778255).

Almost surely, 2^131531484865 is an apocalyptic number.

It is an amenable number.

131531484865 is a deficient number, since it is larger than the sum of its proper divisors (41983193255).

131531484865 is a wasteful number, since it uses less digits than its factorization.

131531484865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29553 (or 29542 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 49.

The spelling of 131531484865 in words is "one hundred thirty-one billion, five hundred thirty-one million, four hundred eighty-four thousand, eight hundred sixty-five".