56505518 has 16 divisors (see below), whose sum is σ = 89884080. Its totient is φ = 26549376.

The previous prime is 56505517. The next prime is 56505551. The reversal of 56505518 is 81550565.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56505517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38828 + ... + 40256.

It is an arithmetic number, because the mean of its divisors is an integer number (5617755).

Almost surely, 2^56505518 is an apocalyptic number.

56505518 is a deficient number, since it is larger than the sum of its proper divisors (33378562).

56505518 is a wasteful number, since it uses less digits than its factorization.

56505518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2611.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 56505518 is about 7517.0152321250. The cubic root of 56505518 is about 383.7340054236.

The spelling of 56505518 in words is "fifty-six million, five hundred five thousand, five hundred eighteen".