222255220 has 36 divisors (see below), whose sum is σ = 513029412. Its totient is φ = 80819200.

The previous prime is 222255211. The next prime is 222255259. The reversal of 222255220 is 22552222.

It can be written as a sum of positive squares in 2 ways, for example, as 134420836 + 87834384 = 11594^2 + 9372^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 222255191 and 222255200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43501 + ... + 48340.

It is an arithmetic number, because the mean of its divisors is an integer number (14250817).

Almost surely, 2^222255220 is an apocalyptic number.

222255220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222255220 is an abundant number, since it is smaller than the sum of its proper divisors (290774192).

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

222255220 is a wasteful number, since it uses less digits than its factorization.

222255220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91872 (or 91859 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 222255220 is about 14908.2265880285. The cubic root of 222255220 is about 605.7368432643.

It can be divided in two parts, 2 and 22255220, that added together give a palindrome (22255222).

The spelling of 222255220 in words is "two hundred twenty-two million, two hundred fifty-five thousand, two hundred twenty".