56518711 has 4 divisors (see below), whose sum is σ = 59493400. Its totient is φ = 53544024.

The previous prime is 56518703. The next prime is 56518729. The reversal of 56518711 is 11781565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11781565 = 5 ⋅2356313.

It is a cyclic number.

It is not a de Polignac number, because 56518711 - 2³ = 56518703 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 (56518741) 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, 1487316 + ... + 1487353.

It is an arithmetic number, because the mean of its divisors is an integer number (14873350).

Almost surely, 2^56518711 is an apocalyptic number.

56518711 is a deficient number, since it is larger than the sum of its proper divisors (2974689).

56518711 is a wasteful number, since it uses less digits than its factorization.

56518711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974688.

The product of its digits is 8400, while the sum is 34.

The square root of 56518711 is about 7517.8927233634. The cubic root of 56518711 is about 383.7638680456.

The spelling of 56518711 in words is "fifty-six million, five hundred eighteen thousand, seven hundred eleven".