56501556 has 12 divisors (see below), whose sum is σ = 131836992. Its totient is φ = 18833848.

The previous prime is 56501537. The next prime is 56501581. The reversal of 56501556 is 65510565.

56501556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×56501556² = 6384851660842272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2354220 + ... + 2354243.

It is an arithmetic number, because the mean of its divisors is an integer number (10986416).

Almost surely, 2^56501556 is an apocalyptic number.

It is an amenable number.

56501556 is an abundant number, since it is smaller than the sum of its proper divisors (75335436).

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

56501556 is a wasteful number, since it uses less digits than its factorization.

56501556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4708470 (or 4708468 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 33.

The square root of 56501556 is about 7516.7516920542. The cubic root of 56501556 is about 383.7250364490.

Subtracting 56501556 from its reverse (65510565), we obtain a palindrome (9009009).

The spelling of 56501556 in words is "fifty-six million, five hundred one thousand, five hundred fifty-six".