56271921 has 8 divisors (see below), whose sum is σ = 79442784. Its totient is φ = 35307840.

The previous prime is 56271889. The next prime is 56271947. The reversal of 56271921 is 12917265.

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

It is not a de Polignac number, because 56271921 - 2⁵ = 56271889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56271221) 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, 551635 + ... + 551736.

It is an arithmetic number, because the mean of its divisors is an integer number (9930348).

Almost surely, 2^56271921 is an apocalyptic number.

56271921 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

56271921 is a deficient number, since it is larger than the sum of its proper divisors (23170863).

56271921 is a wasteful number, since it uses less digits than its factorization.

56271921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103391.

The product of its digits is 7560, while the sum is 33.

The square root of 56271921 is about 7501.4612576484. The cubic root of 56271921 is about 383.2044823817.

The spelling of 56271921 in words is "fifty-six million, two hundred seventy-one thousand, nine hundred twenty-one".