56555407 has 2 divisors, whose sum is σ = 56555408. Its totient is φ = 56555406.

The previous prime is 56555393. The next prime is 56555417. The reversal of 56555407 is 70455565.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56555407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56555417) 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, 28277703 + 28277704.

It is an arithmetic number, because the mean of its divisors is an integer number (28277704).

Almost surely, 2^56555407 is an apocalyptic number.

56555407 is a deficient number, since it is larger than the sum of its proper divisors (1).

56555407 is an equidigital number, since it uses as much as digits as its factorization.

56555407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 56555407 is about 7520.3329048653. The cubic root of 56555407 is about 383.8469057508.

The spelling of 56555407 in words is "fifty-six million, five hundred fifty-five thousand, four hundred seven".