22205791 has 4 divisors (see below), whose sum is σ = 23512032. Its totient is φ = 20899552.

The previous prime is 22205789. The next prime is 22205803. The reversal of 22205791 is 19750222.

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 22205791 - 2¹ = 22205789 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 (22205731) 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, 653095 + ... + 653128.

It is an arithmetic number, because the mean of its divisors is an integer number (5878008).

Almost surely, 2^22205791 is an apocalyptic number.

22205791 is a deficient number, since it is larger than the sum of its proper divisors (1306241).

22205791 is a wasteful number, since it uses less digits than its factorization.

22205791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1306240.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 22205791 is about 4712.3020913350. The cubic root of 22205791 is about 281.0749115339.

The spelling of 22205791 in words is "twenty-two million, two hundred five thousand, seven hundred ninety-one".