57256403 has 2 divisors, whose sum is σ = 57256404. Its totient is φ = 57256402.

The previous prime is 57256333. The next prime is 57256417. The reversal of 57256403 is 30465275.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57256403 - 2²² = 53062099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57256403.

It is not a weakly prime, because it can be changed into another prime (57216403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28628201 + 28628202.

It is an arithmetic number, because the mean of its divisors is an integer number (28628202).

Almost surely, 2^57256403 is an apocalyptic number.

57256403 is a deficient number, since it is larger than the sum of its proper divisors (1).

57256403 is an equidigital number, since it uses as much as digits as its factorization.

57256403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 57256403 is about 7566.7960855305. The cubic root of 57256403 is about 385.4263068885.

The spelling of 57256403 in words is "fifty-seven million, two hundred fifty-six thousand, four hundred three".