131556380 has 24 divisors (see below), whose sum is σ = 290809680. Its totient is φ = 49852800.

The previous prime is 131556317. The next prime is 131556401. The reversal of 131556380 is 83655131.

It is a super-2 number, since 2×131556380² = 34614162237408800, which contains 22 as substring.

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, 172721 + ... + 173480.

It is an arithmetic number, because the mean of its divisors is an integer number (12117070).

Almost surely, 2^131556380 is an apocalyptic number.

131556380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131556380 is an abundant number, since it is smaller than the sum of its proper divisors (159253300).

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

131556380 is a wasteful number, since it uses less digits than its factorization.

131556380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346229 (or 346227 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 131556380 is about 11469.8029625622. The cubic root of 131556380 is about 508.5933041522.

The spelling of 131556380 in words is "one hundred thirty-one million, five hundred fifty-six thousand, three hundred eighty".