131045140 has 24 divisors (see below), whose sum is σ = 275826600. Its totient is φ = 52297728.

The previous prime is 131045111. The next prime is 131045219. The reversal of 131045140 is 41540131.

It can be written as a sum of positive squares in 4 ways, for example, as 2268036 + 128777104 = 1506^2 + 11348^2 .

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, 1684 + ... + 16276.

It is an arithmetic number, because the mean of its divisors is an integer number (11492775).

Almost surely, 2^131045140 is an apocalyptic number.

131045140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131045140 is an abundant number, since it is smaller than the sum of its proper divisors (144781460).

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

131045140 is a wasteful number, since it uses less digits than its factorization.

131045140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15051 (or 15049 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 131045140 is about 11447.4949224710. The cubic root of 131045140 is about 507.9336356979.

Adding to 131045140 its reverse (41540131), we get a palindrome (172585271).

The spelling of 131045140 in words is "one hundred thirty-one million, forty-five thousand, one hundred forty".