56036881 has 4 divisors (see below), whose sum is σ = 56062692. Its totient is φ = 56011072.

The previous prime is 56036867. The next prime is 56036887. The reversal of 56036881 is 18863065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9579025 + 46457856 = 3095^2 + 6816^2 .

It is a cyclic number.

It is not a de Polignac number, because 56036881 - 2⁷ = 56036753 is a prime.

It is a super-2 number, since 2×56036881² = 6280264064416322, 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 56036881.

It is not an unprimeable number, because it can be changed into a prime (56036887) 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, 9316 + ... + 14101.

It is an arithmetic number, because the mean of its divisors is an integer number (14015673).

Almost surely, 2^56036881 is an apocalyptic number.

It is an amenable number.

56036881 is a deficient number, since it is larger than the sum of its proper divisors (25811).

56036881 is a wasteful number, since it uses less digits than its factorization.

56036881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25810.

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

The square root of 56036881 is about 7485.7785834207. The cubic root of 56036881 is about 382.6702071885.

The spelling of 56036881 in words is "fifty-six million, thirty-six thousand, eight hundred eighty-one".