131320920 has 64 divisors (see below), whose sum is σ = 417143520. Its totient is φ = 32958464.

The previous prime is 131320919. The next prime is 131320927. The reversal of 131320920 is 29023131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131320927) 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, 30147 + ... + 34226.

Almost surely, 2^131320920 is an apocalyptic number.

131320920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131320920 is an abundant number, since it is smaller than the sum of its proper divisors (285822600).

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

131320920 is a wasteful number, since it uses less digits than its factorization.

131320920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64404 (or 64400 counting only the distinct ones).

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

The square root of 131320920 is about 11459.5340219400. The cubic root of 131320920 is about 508.2896956777.

The spelling of 131320920 in words is "one hundred thirty-one million, three hundred twenty thousand, nine hundred twenty".