56221285 has 16 divisors (see below), whose sum is σ = 73468800. Its totient is φ = 41138496.

The previous prime is 56221283. The next prime is 56221301. The reversal of 56221285 is 58212265.

It is not a de Polignac number, because 56221285 - 2¹ = 56221283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56221283) 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, 7449 + ... + 12958.

It is an arithmetic number, because the mean of its divisors is an integer number (4591800).

Almost surely, 2^56221285 is an apocalyptic number.

It is an amenable number.

56221285 is a deficient number, since it is larger than the sum of its proper divisors (17247515).

56221285 is a wasteful number, since it uses less digits than its factorization.

56221285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20460.

The product of its digits is 9600, while the sum is 31.

The square root of 56221285 is about 7498.0854222928. The cubic root of 56221285 is about 383.0895063574.

The spelling of 56221285 in words is "fifty-six million, two hundred twenty-one thousand, two hundred eighty-five".