56837281 has 8 divisors (see below), whose sum is σ = 57484224. Its totient is φ = 56194320.

The previous prime is 56837267. The next prime is 56837309. The reversal of 56837281 is 18273865.

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

It is a cyclic number.

It is not a de Polignac number, because 56837281 - 2⁷ = 56837153 is a prime.

It is a super-2 number, since 2×56837281² = 6460953022945922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56837251) 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, 34431 + ... + 36043.

It is an arithmetic number, because the mean of its divisors is an integer number (7185528).

Almost surely, 2^56837281 is an apocalyptic number.

It is an amenable number.

56837281 is a deficient number, since it is larger than the sum of its proper divisors (646943).

56837281 is a wasteful number, since it uses less digits than its factorization.

56837281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991.

The product of its digits is 80640, while the sum is 40.

The square root of 56837281 is about 7539.0504043944. The cubic root of 56837281 is about 384.4835510805.

The spelling of 56837281 in words is "fifty-six million, eight hundred thirty-seven thousand, two hundred eighty-one".