131231144 has 32 divisors (see below), whose sum is σ = 274147200. Its totient is φ = 58379520.

The previous prime is 131231131. The next prime is 131231179. The reversal of 131231144 is 441132131.

It is a super-2 number, since 2×131231144² = 34443226311097472, which contains 22 as substring.

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, 11729 + ... + 20000.

It is an arithmetic number, because the mean of its divisors is an integer number (8567100).

Almost surely, 2^131231144 is an apocalyptic number.

It is an amenable number.

131231144 is an abundant number, since it is smaller than the sum of its proper divisors (142916056).

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

131231144 is a wasteful number, since it uses less digits than its factorization.

131231144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31793 (or 31789 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 131231144 is about 11455.6162645228. The cubic root of 131231144 is about 508.1738405185.

Adding to 131231144 its reverse (441132131), we get a palindrome (572363275).

The spelling of 131231144 in words is "one hundred thirty-one million, two hundred thirty-one thousand, one hundred forty-four".