22222191 has 16 divisors (see below), whose sum is σ = 31363200. Its totient is φ = 13956768.

The previous prime is 22222129. The next prime is 22222199. The reversal of 22222191 is 19122222.

It is a happy number.

It is not a de Polignac number, because 22222191 - 2⁷ = 22222063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22222199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10240 + ... + 12218.

It is an arithmetic number, because the mean of its divisors is an integer number (1960200).

Almost surely, 2^22222191 is an apocalyptic number.

22222191 is a deficient number, since it is larger than the sum of its proper divisors (9141009).

22222191 is a wasteful number, since it uses less digits than its factorization.

22222191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198.

The product of its digits is 288, while the sum is 21.

The square root of 22222191 is about 4714.0418962924. The cubic root of 22222191 is about 281.1440900980.

The spelling of 22222191 in words is "twenty-two million, two hundred twenty-two thousand, one hundred ninety-one".