56255891 has 2 divisors, whose sum is σ = 56255892. Its totient is φ = 56255890.

The previous prime is 56255879. The next prime is 56255923. The reversal of 56255891 is 19855265.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56255891 - 2¹⁴ = 56239507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56255831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28127945 + 28127946.

It is an arithmetic number, because the mean of its divisors is an integer number (28127946).

Almost surely, 2^56255891 is an apocalyptic number.

56255891 is a deficient number, since it is larger than the sum of its proper divisors (1).

56255891 is an equidigital number, since it uses as much as digits as its factorization.

56255891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 41.

The square root of 56255891 is about 7500.3927230512. The cubic root of 56255891 is about 383.1680915191.

The spelling of 56255891 in words is "fifty-six million, two hundred fifty-five thousand, eight hundred ninety-one".