56518223 has 2 divisors, whose sum is σ = 56518224. Its totient is φ = 56518222.

The previous prime is 56518219. The next prime is 56518229. The reversal of 56518223 is 32281565.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56518223 - 2² = 56518219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56518223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56518229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28259111 + 28259112.

It is an arithmetic number, because the mean of its divisors is an integer number (28259112).

Almost surely, 2^56518223 is an apocalyptic number.

56518223 is a deficient number, since it is larger than the sum of its proper divisors (1).

56518223 is an equidigital number, since it uses as much as digits as its factorization.

56518223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 32.

The square root of 56518223 is about 7517.8602673899. The cubic root of 56518223 is about 383.7627635305.

Adding to 56518223 its reverse (32281565), we get a palindrome (88799788).

The spelling of 56518223 in words is "fifty-six million, five hundred eighteen thousand, two hundred twenty-three".