56424287 has 2 divisors, whose sum is σ = 56424288. Its totient is φ = 56424286.

The previous prime is 56424233. The next prime is 56424293. The reversal of 56424287 is 78242465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56424287 - 2⁸ = 56424031 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56424287.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56424217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28212143 + 28212144.

It is an arithmetic number, because the mean of its divisors is an integer number (28212144).

Almost surely, 2^56424287 is an apocalyptic number.

56424287 is a deficient number, since it is larger than the sum of its proper divisors (1).

56424287 is an equidigital number, since it uses as much as digits as its factorization.

56424287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 107520, while the sum is 38.

The square root of 56424287 is about 7511.6101469658. The cubic root of 56424287 is about 383.5500349196.

The spelling of 56424287 in words is "fifty-six million, four hundred twenty-four thousand, two hundred eighty-seven".