222155460 has 108 divisors (see below), whose sum is σ = 700167468. Its totient is φ = 59206464.

The previous prime is 222155431. The next prime is 222155477. The reversal of 222155460 is 64551222.

It can be written as a sum of positive squares in 2 ways, for example, as 82301184 + 139854276 = 9072^2 + 11826^2 .

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 130374 + ... + 132066.

Almost surely, 2^222155460 is an apocalyptic number.

222155460 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 222155460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350083734).

222155460 is an abundant number, since it is smaller than the sum of its proper divisors (478012008).

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

222155460 is an equidigital number, since it uses as much as digits as its factorization.

222155460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726 (or 1703 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 222155460 is about 14904.8804087789. The cubic root of 222155460 is about 605.6462006975.

The spelling of 222155460 in words is "two hundred twenty-two million, one hundred fifty-five thousand, four hundred sixty".