56103981 has 8 divisors (see below), whose sum is σ = 74840544. Its totient is φ = 37385040.

The previous prime is 56103977. The next prime is 56104003. The reversal of 56103981 is 18930165.

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

It is not a de Polignac number, because 56103981 - 2² = 56103977 is a prime.

It is a super-2 number, since 2×56103981² = 6295313368096722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56103911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8095 + ... + 13331.

It is an arithmetic number, because the mean of its divisors is an integer number (9355068).

Almost surely, 2^56103981 is an apocalyptic number.

It is an amenable number.

56103981 is a deficient number, since it is larger than the sum of its proper divisors (18736563).

56103981 is a wasteful number, since it uses less digits than its factorization.

56103981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8811.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 56103981 is about 7490.2590742911. The cubic root of 56103981 is about 382.8228859745.

It can be divided in two parts, 5610 and 3981, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 56103981 in words is "fifty-six million, one hundred three thousand, nine hundred eighty-one".