222665320 has 64 divisors (see below), whose sum is σ = 541831680. Its totient is φ = 82031616.

The previous prime is 222665293. The next prime is 222665329. The reversal of 222665320 is 23566222.

It is not an unprimeable number, because it can be changed into a prime (222665329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28477 + ... + 35443.

It is an arithmetic number, because the mean of its divisors is an integer number (8466120).

Almost surely, 2^222665320 is an apocalyptic number.

222665320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222665320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270915840).

222665320 is an abundant number, since it is smaller than the sum of its proper divisors (319166360).

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

222665320 is a wasteful number, since it uses less digits than its factorization.

222665320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7042 (or 7038 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 222665320 is about 14921.9744001925. The cubic root of 222665320 is about 606.1091780476.

The spelling of 222665320 in words is "two hundred twenty-two million, six hundred sixty-five thousand, three hundred twenty".