222199812 has 18 divisors (see below), whose sum is σ = 561671838. Its totient is φ = 74066592.

The previous prime is 222199811. The next prime is 222199853. The reversal of 222199812 is 218991222.

222199812 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 189778176 + 32421636 = 13776^2 + 5694^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6172217 = 222199812 / (2 + 2 + 2 + 1 + 9 + 9 + 8 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (222199811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3086073 + ... + 3086144.

It is an arithmetic number, because the mean of its divisors is an integer number (31203991).

Almost surely, 2^222199812 is an apocalyptic number.

It is an amenable number.

222199812 is an abundant number, since it is smaller than the sum of its proper divisors (339472026).

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

222199812 is a wasteful number, since it uses less digits than its factorization.

222199812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172227 (or 6172222 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 222199812 is about 14906.3681693429. The cubic root of 222199812 is about 605.6865025548.

The spelling of 222199812 in words is "two hundred twenty-two million, one hundred ninety-nine thousand, eight hundred twelve".