56557243 has 4 divisors (see below), whose sum is σ = 59533960. Its totient is φ = 53580528.

The previous prime is 56557231. The next prime is 56557247. The reversal of 56557243 is 34275565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34275565 = 5 ⋅6855113.

It is a cyclic number.

It is not a de Polignac number, because 56557243 - 2⁵ = 56557211 is a prime.

It is a super-2 number, since 2×56557243² = 6397443471522098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56557247) 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, 1488330 + ... + 1488367.

It is an arithmetic number, because the mean of its divisors is an integer number (14883490).

Almost surely, 2^56557243 is an apocalyptic number.

56557243 is a deficient number, since it is larger than the sum of its proper divisors (2976717).

56557243 is a wasteful number, since it uses less digits than its factorization.

56557243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976716.

The product of its digits is 126000, while the sum is 37.

The square root of 56557243 is about 7520.4549729388. The cubic root of 56557243 is about 383.8510594079.

The spelling of 56557243 in words is "fifty-six million, five hundred fifty-seven thousand, two hundred forty-three".