56155518 has 20 divisors (see below), whose sum is σ = 125830320. Its totient is φ = 18718452.

The previous prime is 56155511. The next prime is 56155537. The reversal of 56155518 is 81555165.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56155511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 173158 + ... + 173481.

It is an arithmetic number, because the mean of its divisors is an integer number (6291516).

Almost surely, 2^56155518 is an apocalyptic number.

56155518 is an abundant number, since it is smaller than the sum of its proper divisors (69674802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56155518 is a wasteful number, since it uses less digits than its factorization.

56155518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346653 (or 346644 counting only the distinct ones).

The product of its digits is 30000, while the sum is 36.

The square root of 56155518 is about 7493.6985527842. The cubic root of 56155518 is about 382.9400702018.

The spelling of 56155518 in words is "fifty-six million, one hundred fifty-five thousand, five hundred eighteen".