56505144 has 32 divisors (see below), whose sum is σ = 149573520. Its totient is φ = 17726976.

The previous prime is 56505131. The next prime is 56505151. The reversal of 56505144 is 44150565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68839 + ... + 69654.

Almost surely, 2^56505144 is an apocalyptic number.

It is an amenable number.

56505144 is an abundant number, since it is smaller than the sum of its proper divisors (93068376).

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

56505144 is a wasteful number, since it uses less digits than its factorization.

56505144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138519 (or 138515 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 56505144 is about 7516.9903551887. The cubic root of 56505144 is about 383.7331587993.

The spelling of 56505144 in words is "fifty-six million, five hundred five thousand, one hundred forty-four".