22091091 has 24 divisors (see below), whose sum is σ = 34090560. Its totient is φ = 12679920.

The previous prime is 22091077. The next prime is 22091117. The reversal of 22091091 is 19019022.

It is not a de Polignac number, because 22091091 - 2¹³ = 22082899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22091021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5296 + ... + 8498.

It is an arithmetic number, because the mean of its divisors is an integer number (1420440).

Almost surely, 2^22091091 is an apocalyptic number.

22091091 is a deficient number, since it is larger than the sum of its proper divisors (11999469).

22091091 is a wasteful number, since it uses less digits than its factorization.

22091091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247 (or 3236 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 22091091 is about 4700.1160623968. The cubic root of 22091091 is about 280.5901286689.

The spelling of 22091091 in words is "twenty-two million, ninety-one thousand, ninety-one".