131145144 has 64 divisors (see below), whose sum is σ = 371683200. Its totient is φ = 38226816.

The previous prime is 131145143. The next prime is 131145169. The reversal of 131145144 is 441541131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131145143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5134 + ... + 16989.

It is an arithmetic number, because the mean of its divisors is an integer number (5807550).

Almost surely, 2^131145144 is an apocalyptic number.

It is an amenable number.

131145144 is an abundant number, since it is smaller than the sum of its proper divisors (240538056).

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

131145144 is a wasteful number, since it uses less digits than its factorization.

131145144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22164 (or 22160 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The square root of 131145144 is about 11451.8620320016. The cubic root of 131145144 is about 508.0628086930.

Adding to 131145144 its reverse (441541131), we get a palindrome (572686275).

The spelling of 131145144 in words is "one hundred thirty-one million, one hundred forty-five thousand, one hundred forty-four".