22404191 has 4 divisors (see below), whose sum is σ = 22510584. Its totient is φ = 22297800.

The previous prime is 22404149. The next prime is 22404209. The reversal of 22404191 is 19140422.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22404191 - 2¹⁸ = 22142047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22404131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52880 + ... + 53301.

It is an arithmetic number, because the mean of its divisors is an integer number (5627646).

Almost surely, 2^22404191 is an apocalyptic number.

22404191 is a deficient number, since it is larger than the sum of its proper divisors (106393).

22404191 is a wasteful number, since it uses less digits than its factorization.

22404191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106392.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 22404191 is about 4733.3065609571. The cubic root of 22404191 is about 281.9095286797.

The spelling of 22404191 in words is "twenty-two million, four hundred four thousand, one hundred ninety-one".