222659856 has 90 divisors (see below), whose sum is σ = 644288190. Its totient is φ = 71781120.

The previous prime is 222659851. The next prime is 222659861. The reversal of 222659856 is 658956222.

222659856 is a `hidden beast` number, since 2 + 2 + 2 + 6 + 598 + 56 = 666.

It is an interprime number because it is at equal distance from previous prime (222659851) and next prime (222659861).

It can be written as a sum of positive squares in only one way, i.e., 221414400 + 1245456 = 14880^2 + 1116^2 .

It is a super-2 number, since 2×222659856² = 99154822947881472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (222659851) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 137580 + ... + 139188.

Almost surely, 2^222659856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222659856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322144095).

222659856 is an abundant number, since it is smaller than the sum of its proper divisors (421628334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222659856 is a wasteful number, since it uses less digits than its factorization.

222659856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685 (or 1645 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 222659856 is about 14921.7913133779. The cubic root of 222659856 is about 606.1042202217.

The spelling of 222659856 in words is "two hundred twenty-two million, six hundred fifty-nine thousand, eight hundred fifty-six".