222721284 has 48 divisors (see below), whose sum is σ = 551916288. Its totient is φ = 69662208.

The previous prime is 222721273. The next prime is 222721319. The reversal of 222721284 is 482127222.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74629 + ... + 77555.

It is an arithmetic number, because the mean of its divisors is an integer number (11498256).

Almost surely, 2^222721284 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 222721284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275958144).

222721284 is an abundant number, since it is smaller than the sum of its proper divisors (329195004).

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

222721284 is a wasteful number, since it uses less digits than its factorization.

222721284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3324 (or 3322 counting only the distinct ones).

The product of its digits is 7168, while the sum is 30.

The square root of 222721284 is about 14923.8495033956. The cubic root of 222721284 is about 606.1599529843.

The spelling of 222721284 in words is "two hundred twenty-two million, seven hundred twenty-one thousand, two hundred eighty-four".