56455999 has 2 divisors, whose sum is σ = 56456000. Its totient is φ = 56455998.

The previous prime is 56455967. The next prime is 56456021. The reversal of 56455999 is 99955465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56455999 - 2⁵ = 56455967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56455909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28227999 + 28228000.

It is an arithmetic number, because the mean of its divisors is an integer number (28228000).

Almost surely, 2^56455999 is an apocalyptic number.

56455999 is a deficient number, since it is larger than the sum of its proper divisors (1).

56455999 is an equidigital number, since it uses as much as digits as its factorization.

56455999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2187000, while the sum is 52.

The square root of 56455999 is about 7513.7207161299. The cubic root of 56455999 is about 383.6218766825.

The spelling of 56455999 in words is "fifty-six million, four hundred fifty-five thousand, nine hundred ninety-nine".