56558819 has 2 divisors, whose sum is σ = 56558820. Its totient is φ = 56558818.

The previous prime is 56558807. The next prime is 56558833. The reversal of 56558819 is 91885565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56558819 - 2⁸ = 56558563 is a prime.

It is a super-2 number, since 2×56558819² = 6397800013349522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (56558869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28279409 + 28279410.

It is an arithmetic number, because the mean of its divisors is an integer number (28279410).

Almost surely, 2^56558819 is an apocalyptic number.

56558819 is a deficient number, since it is larger than the sum of its proper divisors (1).

56558819 is an equidigital number, since it uses as much as digits as its factorization.

56558819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432000, while the sum is 47.

The square root of 56558819 is about 7520.5597531035. The cubic root of 56558819 is about 383.8546247847.

The spelling of 56558819 in words is "fifty-six million, five hundred fifty-eight thousand, eight hundred nineteen".