131995465 has 24 divisors (see below), whose sum is σ = 189247752. Its totient is φ = 88058880.

The previous prime is 131995453. The next prime is 131995483. The reversal of 131995465 is 564599131.

It can be written as a sum of positive squares in 4 ways, for example, as 64689849 + 67305616 = 8043^2 + 8204^2 .

It is not a de Polignac number, because 131995465 - 2¹⁵ = 131962697 is a prime.

It is a Duffinian number.

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, 1785 + ... + 16345.

It is an arithmetic number, because the mean of its divisors is an integer number (7885323).

Almost surely, 2^131995465 is an apocalyptic number.

It is an amenable number.

131995465 is a deficient number, since it is larger than the sum of its proper divisors (57252287).

131995465 is a wasteful number, since it uses less digits than its factorization.

131995465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14617 (or 14610 counting only the distinct ones).

The product of its digits is 145800, while the sum is 43.

The square root of 131995465 is about 11488.9279308385. The cubic root of 131995465 is about 509.1585059389.

The spelling of 131995465 in words is "one hundred thirty-one million, nine hundred ninety-five thousand, four hundred sixty-five".