131555020 has 24 divisors (see below), whose sum is σ = 285793200. Its totient is φ = 50807232.

The previous prime is 131555003. The next prime is 131555023. The reversal of 131555020 is 20555131.

It is a junction number, because it is equal to n+sod(n) for n = 131554982 and 131555000.

It is not an unprimeable number, because it can be changed into a prime (131555023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112830 + ... + 113989.

It is an arithmetic number, because the mean of its divisors is an integer number (11908050).

Almost surely, 2^131555020 is an apocalyptic number.

131555020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131555020 is an abundant number, since it is smaller than the sum of its proper divisors (154238180).

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

131555020 is a wasteful number, since it uses less digits than its factorization.

131555020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226857 (or 226855 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 131555020 is about 11469.7436762990. The cubic root of 131555020 is about 508.5915515721.

The spelling of 131555020 in words is "one hundred thirty-one million, five hundred fifty-five thousand, twenty".