56002221 has 24 divisors (see below), whose sum is σ = 88564320. Its totient is φ = 33818400.

The previous prime is 56002207. The next prime is 56002223. The reversal of 56002221 is 12220065.

It is not a de Polignac number, because 56002221 - 2⁶ = 56002157 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56002194 and 56002203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56002223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31915 + ... + 33623.

It is an arithmetic number, because the mean of its divisors is an integer number (3690180).

Almost surely, 2^56002221 is an apocalyptic number.

It is an amenable number.

56002221 is a deficient number, since it is larger than the sum of its proper divisors (32562099).

56002221 is a wasteful number, since it uses less digits than its factorization.

56002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 56002221 is about 7483.4631688811. The cubic root of 56002221 is about 382.5912943688.

Adding to 56002221 its reverse (12220065), we get a palindrome (68222286).

The spelling of 56002221 in words is "fifty-six million, two thousand, two hundred twenty-one".