56021217 has 16 divisors (see below), whose sum is σ = 87352320. Its totient is φ = 31267152.

The previous prime is 56021213. The next prime is 56021221. The reversal of 56021217 is 71212065.

56021217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56021213) and next prime (56021221).

It is not a de Polignac number, because 56021217 - 2² = 56021213 is a prime.

It is a super-2 number, since 2×56021217² = 6276753508322178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56021213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30117 + ... + 31922.

It is an arithmetic number, because the mean of its divisors is an integer number (5459520).

Almost surely, 2^56021217 is an apocalyptic number.

It is an amenable number.

56021217 is a deficient number, since it is larger than the sum of its proper divisors (31331103).

56021217 is a wasteful number, since it uses less digits than its factorization.

56021217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62092.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 56021217 is about 7484.7322597405. The cubic root of 56021217 is about 382.6345479071.

The spelling of 56021217 in words is "fifty-six million, twenty-one thousand, two hundred seventeen".