56431087 has 2 divisors, whose sum is σ = 56431088. Its totient is φ = 56431086.

The previous prime is 56431079. The next prime is 56431091. The reversal of 56431087 is 78013465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56431087 - 2³ = 56431079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56431057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28215543 + 28215544.

It is an arithmetic number, because the mean of its divisors is an integer number (28215544).

Almost surely, 2^56431087 is an apocalyptic number.

56431087 is a deficient number, since it is larger than the sum of its proper divisors (1).

56431087 is an equidigital number, since it uses as much as digits as its factorization.

56431087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 56431087 is about 7512.0627659785. The cubic root of 56431087 is about 383.5654422061.

The spelling of 56431087 in words is "fifty-six million, four hundred thirty-one thousand, eighty-seven".