56753881 has 4 divisors (see below), whose sum is σ = 58138164. Its totient is φ = 55369600.

The previous prime is 56753869. The next prime is 56753941. The reversal of 56753881 is 18835765.

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 15280281 + 41473600 = 3909^2 + 6440^2 .

It is a cyclic number.

It is not a de Polignac number, because 56753881 - 2²¹ = 54656729 is a prime.

It is a super-2 number, since 2×56753881² = 6442006017124322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56753681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692080 + ... + 692161.

It is an arithmetic number, because the mean of its divisors is an integer number (14534541).

Almost surely, 2^56753881 is an apocalyptic number.

It is an amenable number.

56753881 is a deficient number, since it is larger than the sum of its proper divisors (1384283).

56753881 is a wasteful number, since it uses less digits than its factorization.

56753881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384282.

The product of its digits is 201600, while the sum is 43.

The square root of 56753881 is about 7533.5171732731. The cubic root of 56753881 is about 384.2954021266.

The spelling of 56753881 in words is "fifty-six million, seven hundred fifty-three thousand, eight hundred eighty-one".