56505138 has 8 divisors (see below), whose sum is σ = 113010288. Its totient is φ = 18835044.

The previous prime is 56505131. The next prime is 56505151. The reversal of 56505138 is 83150565.

It is a sphenic number, since it is the product of 3 distinct primes.

56505138 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56505099 and 56505108.

It is not an unprimeable number, because it can be changed into a prime (56505131) 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, 4708756 + ... + 4708767.

It is an arithmetic number, because the mean of its divisors is an integer number (14126286).

Almost surely, 2^56505138 is an apocalyptic number.

56505138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

56505138 is a wasteful number, since it uses less digits than its factorization.

56505138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9417528.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 56505138 is about 7516.9899560928. The cubic root of 56505138 is about 383.7331452171.

The spelling of 56505138 in words is "fifty-six million, five hundred five thousand, one hundred thirty-eight".