131135840 has 48 divisors (see below), whose sum is σ = 337977360. Its totient is φ = 47685120.

The previous prime is 131135839. The next prime is 131135863. The reversal of 131135840 is 48531131.

131135840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 35495 + ... + 39014.

It is an arithmetic number, because the mean of its divisors is an integer number (7041195).

Almost surely, 2^131135840 is an apocalyptic number.

131135840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131135840 is an abundant number, since it is smaller than the sum of its proper divisors (206841520).

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

131135840 is a wasteful number, since it uses less digits than its factorization.

131135840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74535 (or 74527 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 131135840 is about 11451.4558026480. The cubic root of 131135840 is about 508.0507936894.

Adding to 131135840 its reverse (48531131), we get a palindrome (179666971).

The spelling of 131135840 in words is "one hundred thirty-one million, one hundred thirty-five thousand, eight hundred forty".