56733881 has 4 divisors (see below), whose sum is σ = 56875764. Its totient is φ = 56592000.

The previous prime is 56733863. The next prime is 56733917. The reversal of 56733881 is 18833765.

56733881 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 an emirpimes, since its reverse is a distinct semiprime: 18833765 = 5 ⋅3766753.

It can be written as a sum of positive squares in 2 ways, for example, as 50282281 + 6451600 = 7091^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 56733881 - 2¹⁰ = 56732857 is a prime.

It is a super-2 number, since 2×56733881² = 6437466506644322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56730881) 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, 70340 + ... + 71141.

It is an arithmetic number, because the mean of its divisors is an integer number (14218941).

Almost surely, 2^56733881 is an apocalyptic number.

It is an amenable number.

56733881 is a deficient number, since it is larger than the sum of its proper divisors (141883).

56733881 is a wasteful number, since it uses less digits than its factorization.

56733881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141882.

The product of its digits is 120960, while the sum is 41.

The square root of 56733881 is about 7532.1896550737. The cubic root of 56733881 is about 384.2502550757.

The spelling of 56733881 in words is "fifty-six million, seven hundred thirty-three thousand, eight hundred eighty-one".