56173281 has 8 divisors (see below), whose sum is σ = 75924000. Its totient is φ = 36935712.

The previous prime is 56173241. The next prime is 56173297. The reversal of 56173281 is 18237165.

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

It is not a de Polignac number, because 56173281 - 2⁶ = 56173217 is a prime.

It is a super-2 number, since 2×56173281² = 6310874996609922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56173211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128031 + ... + 128468.

It is an arithmetic number, because the mean of its divisors is an integer number (9490500).

Almost surely, 2^56173281 is an apocalyptic number.

It is an amenable number.

56173281 is a deficient number, since it is larger than the sum of its proper divisors (19750719).

56173281 is a wasteful number, since it uses less digits than its factorization.

56173281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256575.

The product of its digits is 10080, while the sum is 33.

The square root of 56173281 is about 7494.8836548675. The cubic root of 56173281 is about 382.9804428883.

The spelling of 56173281 in words is "fifty-six million, one hundred seventy-three thousand, two hundred eighty-one".