222218740 has 12 divisors (see below), whose sum is σ = 466659396. Its totient is φ = 88887488.

The previous prime is 222218719. The next prime is 222218753. The reversal of 222218740 is 47812222.

It can be written as a sum of positive squares in 2 ways, for example, as 170981776 + 51236964 = 13076^2 + 7158^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222218699 and 222218708.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555449 + ... + 5555488.

It is an arithmetic number, because the mean of its divisors is an integer number (38888283).

Almost surely, 2^222218740 is an apocalyptic number.

222218740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222218740 is an abundant number, since it is smaller than the sum of its proper divisors (244440656).

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

222218740 is a wasteful number, since it uses less digits than its factorization.

222218740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110946 (or 11110944 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 222218740 is about 14907.0030522570. The cubic root of 222218740 is about 605.7037004520.

The spelling of 222218740 in words is "two hundred twenty-two million, two hundred eighteen thousand, seven hundred forty".