222145644 has 96 divisors (see below), whose sum is σ = 627827200. Its totient is φ = 59719680.

The previous prime is 222145639. The next prime is 222145711. The reversal of 222145644 is 446541222.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288492 + ... + 289260.

Almost surely, 2^222145644 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 222145644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313913600).

222145644 is an abundant number, since it is smaller than the sum of its proper divisors (405681556).

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

222145644 is a wasteful number, since it uses less digits than its factorization.

222145644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983 (or 981 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 222145644 is about 14904.5511170246. The cubic root of 222145644 is about 605.6372803516.

Adding to 222145644 its reverse (446541222), we get a palindrome (668686866).

The spelling of 222145644 in words is "two hundred twenty-two million, one hundred forty-five thousand, six hundred forty-four".