222515440 has 80 divisors (see below), whose sum is σ = 594551232. Its totient is φ = 75866112.

The previous prime is 222515417. The next prime is 222515471. The reversal of 222515440 is 44515222.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

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, 109312 + ... + 111328.

Almost surely, 2^222515440 is an apocalyptic number.

222515440 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 222515440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297275616).

222515440 is an abundant number, since it is smaller than the sum of its proper divisors (372035792).

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

222515440 is a wasteful number, since it uses less digits than its factorization.

222515440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234 (or 2228 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 222515440 is about 14916.9514311739. The cubic root of 222515440 is about 605.9731532218.

The spelling of 222515440 in words is "two hundred twenty-two million, five hundred fifteen thousand, four hundred forty".