56557271 has 4 divisors (see below), whose sum is σ = 56937000. Its totient is φ = 56177544.

The previous prime is 56557247. The next prime is 56557289. The reversal of 56557271 is 17275565.

56557271 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17275565 = 5 ⋅3455113.

It is a cyclic number.

It is not a de Polignac number, because 56557271 - 2²² = 52362967 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 (56557211) 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, 189641 + ... + 189938.

It is an arithmetic number, because the mean of its divisors is an integer number (14234250).

Almost surely, 2^56557271 is an apocalyptic number.

56557271 is a deficient number, since it is larger than the sum of its proper divisors (379729).

56557271 is a wasteful number, since it uses less digits than its factorization.

56557271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379728.

The product of its digits is 73500, while the sum is 38.

The square root of 56557271 is about 7520.4568345281. The cubic root of 56557271 is about 383.8511227527.

The spelling of 56557271 in words is "fifty-six million, five hundred fifty-seven thousand, two hundred seventy-one".