56044981 has 4 divisors (see below), whose sum is σ = 56060032. Its totient is φ = 56029932.

The previous prime is 56044979. The next prime is 56045027. The reversal of 56044981 is 18944065.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 56044981 - 2¹ = 56044979 is a prime.

It is a super-2 number, since 2×56044981² = 6282079790580722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56044981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56044921) 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, 2620 + ... + 10906.

It is an arithmetic number, because the mean of its divisors is an integer number (14015008).

Almost surely, 2^56044981 is an apocalyptic number.

It is an amenable number.

56044981 is a deficient number, since it is larger than the sum of its proper divisors (15051).

56044981 is an equidigital number, since it uses as much as digits as its factorization.

56044981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15050.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 56044981 is about 7486.3195897584. The cubic root of 56044981 is about 382.6886443278.

It can be divided in two parts, 5604 and 4981, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 56044981 in words is "fifty-six million, forty-four thousand, nine hundred eighty-one".