9999222 has 16 divisors (see below), whose sum is σ = 20029440. Its totient is φ = 3327912.

The previous prime is 9999221. The next prime is 9999233. The reversal of 9999222 is 2229999.

9999222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7023 + ... + 8325.

It is an arithmetic number, because the mean of its divisors is an integer number (1251840).

Almost surely, 2^9999222 is an apocalyptic number.

9999222 is an abundant number, since it is smaller than the sum of its proper divisors (10030218).

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

9999222 is a wasteful number, since it uses less digits than its factorization.

9999222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587.

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

The square root of 9999222 is about 3162.1546451747. The cubic root of 9999222 is about 215.4378816910.

It can be divided in two parts, 999 and 9222, that multiplied together give a triangular number (9212778 = T₄₂₉₂).

The spelling of 9999222 in words is "nine million, nine hundred ninety-nine thousand, two hundred twenty-two".