556981131 has 32 divisors (see below), whose sum is σ = 857579008. Its totient is φ = 314979840.

The previous prime is 556981127. The next prime is 556981157. The reversal of 556981131 is 131189655.

556981131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 556981131 - 2² = 556981127 is a prime.

It is a super-2 number, since 2×556981131² = 620455960580078322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 556981131.

It is not an unprimeable number, because it can be changed into a prime (556981111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1493061 + ... + 1493433.

It is an arithmetic number, because the mean of its divisors is an integer number (26799344).

Almost surely, 2^556981131 is an apocalyptic number.

556981131 is a deficient number, since it is larger than the sum of its proper divisors (300597877).

556981131 is a wasteful number, since it uses less digits than its factorization.

556981131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

The product of its digits is 32400, while the sum is 39.

The square root of 556981131 is about 23600.4476864317. The cubic root of 556981131 is about 822.7732451345.

The spelling of 556981131 in words is "five hundred fifty-six million, nine hundred eighty-one thousand, one hundred thirty-one".