56718457 has 4 divisors (see below), whose sum is σ = 58101876. Its totient is φ = 55335040.

The previous prime is 56718451. The next prime is 56718463. The reversal of 56718457 is 75481765.

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

It is an interprime number because it is at equal distance from previous prime (56718451) and next prime (56718463).

It can be written as a sum of positive squares in 2 ways, for example, as 17480761 + 39237696 = 4181^2 + 6264^2 .

It is a cyclic number.

It is not a de Polignac number, because 56718457 - 2³ = 56718449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56718451) 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, 691648 + ... + 691729.

It is an arithmetic number, because the mean of its divisors is an integer number (14525469).

Almost surely, 2^56718457 is an apocalyptic number.

It is an amenable number.

56718457 is a deficient number, since it is larger than the sum of its proper divisors (1383419).

56718457 is a wasteful number, since it uses less digits than its factorization.

56718457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383418.

The product of its digits is 235200, while the sum is 43.

The square root of 56718457 is about 7531.1657132213. The cubic root of 56718457 is about 384.2154304230.

It can be divided in two parts, 56718 and 457, that added together give a palindrome (57175).

The spelling of 56718457 in words is "fifty-six million, seven hundred eighteen thousand, four hundred fifty-seven".