99990222 has 24 divisors (see below), whose sum is σ = 204762024. Its totient is φ = 32551344.

The previous prime is 99990181. The next prime is 99990239. The reversal of 99990222 is 22209999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6588 + ... + 15600.

It is an arithmetic number, because the mean of its divisors is an integer number (8531751).

Almost surely, 2^99990222 is an apocalyptic number.

99990222 is an abundant number, since it is smaller than the sum of its proper divisors (104771802).

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

99990222 is a wasteful number, since it uses less digits than its factorization.

99990222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9104 (or 9061 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 99990222 is about 9999.5110880483. The cubic root of 99990222 is about 464.1437543830.

It can be divided in two parts, 9 and 9990222, that multiplied together give a palindrome (89911998).

The spelling of 99990222 in words is "ninety-nine million, nine hundred ninety thousand, two hundred twenty-two".