131304231 has 24 divisors (see below), whose sum is σ = 205049520. Its totient is φ = 80683776.

The previous prime is 131304221. The next prime is 131304233. The reversal of 131304231 is 132403131.

131304231 is a `hidden beast` number, since 131 + 304 + 231 = 666.

It is not a de Polignac number, because 131304231 - 2⁶ = 131304167 is a prime.

It is a super-2 number, since 2×131304231² = 34481602157002722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131304233) 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, 4050 + ... + 16703.

It is an arithmetic number, because the mean of its divisors is an integer number (8543730).

Almost surely, 2^131304231 is an apocalyptic number.

131304231 is a deficient number, since it is larger than the sum of its proper divisors (73745289).

131304231 is a wasteful number, since it uses less digits than its factorization.

131304231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20815 (or 20812 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 131304231 is about 11458.8058278339. The cubic root of 131304231 is about 508.2681626625.

Adding to 131304231 its reverse (132403131), we get a palindrome (263707362).

The spelling of 131304231 in words is "one hundred thirty-one million, three hundred four thousand, two hundred thirty-one".