56557451 has 2 divisors, whose sum is σ = 56557452. Its totient is φ = 56557450.

The previous prime is 56557439. The next prime is 56557469. The reversal of 56557451 is 15475565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56557451 - 2¹⁰ = 56556427 is a prime.

It is not a weakly prime, because it can be changed into another prime (56557421) 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, 28278725 + 28278726.

It is an arithmetic number, because the mean of its divisors is an integer number (28278726).

Almost surely, 2^56557451 is an apocalyptic number.

56557451 is a deficient number, since it is larger than the sum of its proper divisors (1).

56557451 is an equidigital number, since it uses as much as digits as its factorization.

56557451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105000, while the sum is 38.

The square root of 56557451 is about 7520.4688018766. The cubic root of 56557451 is about 383.8515299690.

The spelling of 56557451 in words is "fifty-six million, five hundred fifty-seven thousand, four hundred fifty-one".