22166321 has 8 divisors (see below), whose sum is σ = 22486464. Its totient is φ = 21848400.

The previous prime is 22166311. The next prime is 22166327. The reversal of 22166321 is 12366122.

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 22166321 - 2⁶ = 22166257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22166327) 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, 31271 + ... + 31971.

It is an arithmetic number, because the mean of its divisors is an integer number (2810808).

Almost surely, 2^22166321 is an apocalyptic number.

It is an amenable number.

22166321 is a deficient number, since it is larger than the sum of its proper divisors (320143).

22166321 is a wasteful number, since it uses less digits than its factorization.

22166321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its digits is 864, while the sum is 23.

The square root of 22166321 is about 4708.1122543967. The cubic root of 22166321 is about 280.9082792301.

The spelling of 22166321 in words is "twenty-two million, one hundred sixty-six thousand, three hundred twenty-one".