56065021 has 4 divisors (see below), whose sum is σ = 56330944. Its totient is φ = 55799100.

The previous prime is 56065001. The next prime is 56065049. The reversal of 56065021 is 12056065.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56065021 - 2⁵ = 56064989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56065001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132645 + ... + 133066.

It is an arithmetic number, because the mean of its divisors is an integer number (14082736).

Almost surely, 2^56065021 is an apocalyptic number.

It is an amenable number.

56065021 is a deficient number, since it is larger than the sum of its proper divisors (265923).

56065021 is a wasteful number, since it uses less digits than its factorization.

56065021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265922.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 56065021 is about 7487.6579115235. The cubic root of 56065021 is about 382.7342515431.

The spelling of 56065021 in words is "fifty-six million, sixty-five thousand, twenty-one".