22399217 has 8 divisors (see below), whose sum is σ = 24748416. Its totient is φ = 20164672.

The previous prime is 22399211. The next prime is 22399249. The reversal of 22399217 is 71299322.

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 22399217 - 2¹⁰ = 22398193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22399211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28253 + ... + 29034.

It is an arithmetic number, because the mean of its divisors is an integer number (3093552).

Almost surely, 2^22399217 is an apocalyptic number.

It is an amenable number.

22399217 is a deficient number, since it is larger than the sum of its proper divisors (2349199).

22399217 is a wasteful number, since it uses less digits than its factorization.

22399217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57327.

The product of its digits is 13608, while the sum is 35.

The square root of 22399217 is about 4732.7811062841. The cubic root of 22399217 is about 281.8886646997. Note that the first 3 decimals are identical.

The spelling of 22399217 in words is "twenty-two million, three hundred ninety-nine thousand, two hundred seventeen".