56648181 has 4 divisors (see below), whose sum is σ = 75530912. Its totient is φ = 37765452.

The previous prime is 56648171. The next prime is 56648203. The reversal of 56648181 is 18184665.

56648181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56648181 - 2¹⁵ = 56615413 is a prime.

It is a super-2 number, since 2×56648181² = 6418032821217522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56648171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9441361 + ... + 9441366.

It is an arithmetic number, because the mean of its divisors is an integer number (18882728).

Almost surely, 2^56648181 is an apocalyptic number.

It is an amenable number.

56648181 is a deficient number, since it is larger than the sum of its proper divisors (18882731).

56648181 is a wasteful number, since it uses less digits than its factorization.

56648181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18882730.

The product of its digits is 46080, while the sum is 39.

The square root of 56648181 is about 7526.4985883211. The cubic root of 56648181 is about 384.0566797303.

The spelling of 56648181 in words is "fifty-six million, six hundred forty-eight thousand, one hundred eighty-one".