22205491 has 8 divisors (see below), whose sum is σ = 27684864. Its totient is φ = 17302920.

The previous prime is 22205483. The next prime is 22205497. The reversal of 22205491 is 19450222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22205491 - 2³ = 22205483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22205497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144115 + ... + 144268.

It is an arithmetic number, because the mean of its divisors is an integer number (3460608).

Almost surely, 2^22205491 is an apocalyptic number.

22205491 is a deficient number, since it is larger than the sum of its proper divisors (5479373).

22205491 is a wasteful number, since it uses less digits than its factorization.

22205491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288401.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 22205491 is about 4712.2702596519. The cubic root of 22205491 is about 281.0736457552.

The spelling of 22205491 in words is "twenty-two million, two hundred five thousand, four hundred ninety-one".