22165491 has 8 divisors (see below), whose sum is σ = 30839040. Its totient is φ = 14134472.

The previous prime is 22165487. The next prime is 22165513. The reversal of 22165491 is 19456122.

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 22165491 - 2² = 22165487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22165411) 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, 160551 + ... + 160688.

It is an arithmetic number, because the mean of its divisors is an integer number (3854880).

Almost surely, 2^22165491 is an apocalyptic number.

22165491 is a deficient number, since it is larger than the sum of its proper divisors (8673549).

22165491 is a wasteful number, since it uses less digits than its factorization.

22165491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321265.

The product of its digits is 4320, while the sum is 30.

The square root of 22165491 is about 4708.0241078397. The cubic root of 22165491 is about 280.9047730584.

The spelling of 22165491 in words is "twenty-two million, one hundred sixty-five thousand, four hundred ninety-one".