131351631 has 8 divisors (see below), whose sum is σ = 175211520. Its totient is φ = 87529752.

The previous prime is 131351621. The next prime is 131351651. The reversal of 131351631 is 136153131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131351631 - 2⁵ = 131351599 is a prime.

It is a super-2 number, since 2×131351631² = 34506501932720322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131351621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111 + ... + 16208.

It is an arithmetic number, because the mean of its divisors is an integer number (21901440).

Almost surely, 2^131351631 is an apocalyptic number.

131351631 is a deficient number, since it is larger than the sum of its proper divisors (43859889).

131351631 is a wasteful number, since it uses less digits than its factorization.

131351631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19005.

The product of its digits is 810, while the sum is 24.

The square root of 131351631 is about 11460.8739195578. The cubic root of 131351631 is about 508.3293158391.

The spelling of 131351631 in words is "one hundred thirty-one million, three hundred fifty-one thousand, six hundred thirty-one".