22212091 has 6 divisors (see below), whose sum is σ = 24415076. Its totient is φ = 20192700.

The previous prime is 22212079. The next prime is 22212097. The reversal of 22212091 is 19021222.

It is not a de Polignac number, because 22212091 - 2¹⁵ = 22179323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22212097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91665 + ... + 91906.

Almost surely, 2^22212091 is an apocalyptic number.

22212091 is a deficient number, since it is larger than the sum of its proper divisors (2202985).

22212091 is a wasteful number, since it uses less digits than its factorization.

22212091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183593 (or 183582 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 22212091 is about 4712.9705070157. The cubic root of 22212091 is about 281.1014902539.

The spelling of 22212091 in words is "twenty-two million, two hundred twelve thousand, ninety-one".