56731556 has 24 divisors (see below), whose sum is σ = 115065216. Its totient is φ = 23970240.

The previous prime is 56731553. The next prime is 56731573. The reversal of 56731556 is 65513765.

56731556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×56731556² = 6436938892362272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56731553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12281 + ... + 16256.

It is an arithmetic number, because the mean of its divisors is an integer number (4794384).

Almost surely, 2^56731556 is an apocalyptic number.

It is an amenable number.

56731556 is an abundant number, since it is smaller than the sum of its proper divisors (58333660).

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

56731556 is a wasteful number, since it uses less digits than its factorization.

56731556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28619 (or 28617 counting only the distinct ones).

The product of its digits is 94500, while the sum is 38.

The square root of 56731556 is about 7532.0353159023. The cubic root of 56731556 is about 384.2450060427.

It can be divided in two parts, 567 and 31556, that added together give a palindrome (32123).

The spelling of 56731556 in words is "fifty-six million, seven hundred thirty-one thousand, five hundred fifty-six".