56578550 has 96 divisors (see below), whose sum is σ = 131295168. Its totient is φ = 17694720.

The previous prime is 56578549. The next prime is 56578559. The reversal of 56578550 is 5587565.

It is a super-2 number, since 2×56578550² = 6402264640205000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56578498 and 56578507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56578559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 220022 + ... + 220278.

It is an arithmetic number, because the mean of its divisors is an integer number (1367658).

Almost surely, 2^56578550 is an apocalyptic number.

56578550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

56578550 is an abundant number, since it is smaller than the sum of its proper divisors (74716618).

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

56578550 is a wasteful number, since it uses less digits than its factorization.

56578550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 41.

The square root of 56578550 is about 7521.8714426664. The cubic root of 56578550 is about 383.8992565219.

The spelling of 56578550 in words is "fifty-six million, five hundred seventy-eight thousand, five hundred fifty".