131531256 has 32 divisors (see below), whose sum is σ = 365365200. Its totient is φ = 43843680.

The previous prime is 131531249. The next prime is 131531299. The reversal of 131531256 is 652135131.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304255 + ... + 304686.

Almost surely, 2^131531256 is an apocalyptic number.

It is an amenable number.

131531256 is an abundant number, since it is smaller than the sum of its proper divisors (233833944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131531256 is a wasteful number, since it uses less digits than its factorization.

131531256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608956 (or 608946 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 131531256 is about 11468.7076865704. The cubic root of 131531256 is about 508.5609258627.

Adding to 131531256 its reverse (652135131), we get a palindrome (783666387).

The spelling of 131531256 in words is "one hundred thirty-one million, five hundred thirty-one thousand, two hundred fifty-six".