56557051 has 4 divisors (see below), whose sum is σ = 58381504. Its totient is φ = 54732600.

The previous prime is 56557043. The next prime is 56557057. The reversal of 56557051 is 15075565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15075565 = 5 ⋅3015113.

It is a cyclic number.

It is not a de Polignac number, because 56557051 - 2³ = 56557043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56556998 and 56557016.

It is not an unprimeable number, because it can be changed into a prime (56557057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 912180 + ... + 912241.

It is an arithmetic number, because the mean of its divisors is an integer number (14595376).

Almost surely, 2^56557051 is an apocalyptic number.

56557051 is a deficient number, since it is larger than the sum of its proper divisors (1824453).

56557051 is a wasteful number, since it uses less digits than its factorization.

56557051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824452.

The product of its (nonzero) digits is 26250, while the sum is 34.

The square root of 56557051 is about 7520.4422077428. The cubic root of 56557051 is about 383.8506250427.

The spelling of 56557051 in words is "fifty-six million, five hundred fifty-seven thousand, fifty-one".