222545220 has 48 divisors (see below), whose sum is σ = 625302720. Its totient is φ = 59138176.

The previous prime is 222545207. The next prime is 222545237. The reversal of 222545220 is 22545222.

It is a happy 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, 11251 + ... + 23909.

It is an arithmetic number, because the mean of its divisors is an integer number (13027140).

Almost surely, 2^222545220 is an apocalyptic number.

222545220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222545220 is an abundant number, since it is smaller than the sum of its proper divisors (402757500).

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

222545220 is a wasteful number, since it uses less digits than its factorization.

222545220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12964 (or 12962 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 222545220 is about 14917.9495910128. The cubic root of 222545220 is about 606.0001851670. Note that the first 3 decimals are identical.

The spelling of 222545220 in words is "two hundred twenty-two million, five hundred forty-five thousand, two hundred twenty".