57256559 has 4 divisors (see below), whose sum is σ = 57277080. Its totient is φ = 57236040.

The previous prime is 57256523. The next prime is 57256571. The reversal of 57256559 is 95565275.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57256559 - 2¹² = 57252463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57255559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5264 + ... + 11925.

It is an arithmetic number, because the mean of its divisors is an integer number (14319270).

Almost surely, 2^57256559 is an apocalyptic number.

57256559 is a deficient number, since it is larger than the sum of its proper divisors (20521).

57256559 is a wasteful number, since it uses less digits than its factorization.

57256559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20520.

The product of its digits is 472500, while the sum is 44.

The square root of 57256559 is about 7566.8063937172. The cubic root of 57256559 is about 385.4266569306.

The spelling of 57256559 in words is "fifty-seven million, two hundred fifty-six thousand, five hundred fifty-nine".