9991970222 has 16 divisors (see below), whose sum is σ = 16143805440. Its totient is φ = 4610841312.

The previous prime is 9991970221. The next prime is 9991970227. The reversal of 9991970222 is 2220791999.

It is a happy number.

9991970222 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991970221) 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, 124883 + ... + 188625.

It is an arithmetic number, because the mean of its divisors is an integer number (1008987840).

Almost surely, 2^9991970222 is an apocalyptic number.

9991970222 is a deficient number, since it is larger than the sum of its proper divisors (6151835218).

9991970222 is a wasteful number, since it uses less digits than its factorization.

9991970222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69787.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 9991970222 is about 99959.8430470957. The cubic root of 9991970222 is about 2153.8578812069.

The spelling of 9991970222 in words is "nine billion, nine hundred ninety-one million, nine hundred seventy thousand, two hundred twenty-two".