222266556 has 72 divisors (see below), whose sum is σ = 584547600. Its totient is φ = 71124480.

The previous prime is 222266533. The next prime is 222266567. The reversal of 222266556 is 655662222.

222266556 is a `hidden beast` number, since 22 + 22 + 66 + 556 = 666.

It is a super-2 number, since 2×222266556² = 98804843832202272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 222266556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 219780 + ... + 220788.

Almost surely, 2^222266556 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 222266556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292273800).

222266556 is an abundant number, since it is smaller than the sum of its proper divisors (362281044).

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

222266556 is a wasteful number, since it uses less digits than its factorization.

222266556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1254 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 222266556 is about 14908.6067759533. The cubic root of 222266556 is about 605.7471415093.

It can be divided in two parts, 22226 and 6556, that added together give a palindrome (28782).

The spelling of 222266556 in words is "two hundred twenty-two million, two hundred sixty-six thousand, five hundred fifty-six".