56287591 has 2 divisors, whose sum is σ = 56287592. Its totient is φ = 56287590.

The previous prime is 56287573. The next prime is 56287597. The reversal of 56287591 is 19578265.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56287591 - 2¹⁵ = 56254823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56287597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28143795 + 28143796.

It is an arithmetic number, because the mean of its divisors is an integer number (28143796).

Almost surely, 2^56287591 is an apocalyptic number.

56287591 is a deficient number, since it is larger than the sum of its proper divisors (1).

56287591 is an equidigital number, since it uses as much as digits as its factorization.

56287591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 43.

The square root of 56287591 is about 7502.5056481152. The cubic root of 56287591 is about 383.2400493029.

The spelling of 56287591 in words is "fifty-six million, two hundred eighty-seven thousand, five hundred ninety-one".