131230920 has 32 divisors (see below), whose sum is σ = 393693120. Its totient is φ = 34994880.

The previous prime is 131230907. The next prime is 131230987. The reversal of 131230920 is 29032131.

It is a happy number.

131230920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 546676 + ... + 546915.

It is an arithmetic number, because the mean of its divisors is an integer number (12302910).

Almost surely, 2^131230920 is an apocalyptic number.

131230920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131230920 is an abundant number, since it is smaller than the sum of its proper divisors (262462200).

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

131230920 is a wasteful number, since it uses less digits than its factorization.

131230920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093605 (or 1093601 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 131230920 is about 11455.6064876549. The cubic root of 131230920 is about 508.1735513823.

The spelling of 131230920 in words is "one hundred thirty-one million, two hundred thirty thousand, nine hundred twenty".