56895721 has 16 divisors (see below), whose sum is σ = 60802560. Its totient is φ = 53127360.

The previous prime is 56895703. The next prime is 56895733. The reversal of 56895721 is 12759865.

It is a cyclic number.

It is not a de Polignac number, because 56895721 - 2¹³ = 56887529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56895781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314251 + ... + 314431.

It is an arithmetic number, because the mean of its divisors is an integer number (3800160).

Almost surely, 2^56895721 is an apocalyptic number.

It is an amenable number.

56895721 is a deficient number, since it is larger than the sum of its proper divisors (3906839).

56895721 is a wasteful number, since it uses less digits than its factorization.

56895721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its digits is 151200, while the sum is 43.

The square root of 56895721 is about 7542.9252283183. The cubic root of 56895721 is about 384.6152810636.

The spelling of 56895721 in words is "fifty-six million, eight hundred ninety-five thousand, seven hundred twenty-one".