131531142 has 32 divisors (see below), whose sum is σ = 281685600. Its totient is φ = 40798208.

The previous prime is 131531093. The next prime is 131531143. The reversal of 131531142 is 241135131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131531143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1834 + ... + 16322.

It is an arithmetic number, because the mean of its divisors is an integer number (8802675).

Almost surely, 2^131531142 is an apocalyptic number.

131531142 is an abundant number, since it is smaller than the sum of its proper divisors (150154458).

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

131531142 is a wasteful number, since it uses less digits than its factorization.

131531142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14600.

The product of its digits is 360, while the sum is 21.

The square root of 131531142 is about 11468.7027165238. The cubic root of 131531142 is about 508.5607789370.

Adding to 131531142 its reverse (241135131), we get a palindrome (372666273).

The spelling of 131531142 in words is "one hundred thirty-one million, five hundred thirty-one thousand, one hundred forty-two".