56521550 has 12 divisors (see below), whose sum is σ = 105130176. Its totient is φ = 22608600.

The previous prime is 56521547. The next prime is 56521567. The reversal of 56521550 is 5512565.

It is a super-2 number, since 2×56521550² = 6389371228805000, 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 5 ways as a sum of consecutive naturals, for example, 565166 + ... + 565265.

It is an arithmetic number, because the mean of its divisors is an integer number (8760848).

Almost surely, 2^56521550 is an apocalyptic number.

56521550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56521550 is a deficient number, since it is larger than the sum of its proper divisors (48608626).

56521550 is a wasteful number, since it uses less digits than its factorization.

56521550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130443 (or 1130438 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 29.

The square root of 56521550 is about 7518.0815372008. The cubic root of 56521550 is about 383.7702935718.

The spelling of 56521550 in words is "fifty-six million, five hundred twenty-one thousand, five hundred fifty".