56223218 has 8 divisors (see below), whose sum is σ = 86391900. Its totient is φ = 27425920.

The previous prime is 56223217. The next prime is 56223229. The reversal of 56223218 is 81232265.

It can be written as a sum of positive squares in 2 ways, for example, as 38725729 + 17497489 = 6223^2 + 4183^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×56223218² = 6322100484551048, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56223217) 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, 342743 + ... + 342906.

Almost surely, 2^56223218 is an apocalyptic number.

56223218 is a deficient number, since it is larger than the sum of its proper divisors (30168682).

56223218 is a wasteful number, since it uses less digits than its factorization.

56223218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685692.

The product of its digits is 5760, while the sum is 29.

The square root of 56223218 is about 7498.2143207566. The cubic root of 56223218 is about 383.0938967678.

The spelling of 56223218 in words is "fifty-six million, two hundred twenty-three thousand, two hundred eighteen".