131800920 has 32 divisors (see below), whose sum is σ = 395403120. Its totient is φ = 35146880.

The previous prime is 131800883. The next prime is 131800927. The reversal of 131800920 is 29008131.

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 (131800927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549051 + ... + 549290.

Almost surely, 2^131800920 is an apocalyptic number.

131800920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131800920 is an abundant number, since it is smaller than the sum of its proper divisors (263602200).

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

131800920 is a wasteful number, since it uses less digits than its factorization.

131800920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1098355 (or 1098351 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 131800920 is about 11480.4581790101. The cubic root of 131800920 is about 508.9082373760.

The spelling of 131800920 in words is "one hundred thirty-one million, eight hundred thousand, nine hundred twenty".