22297321 has 4 divisors (see below), whose sum is σ = 22309632. Its totient is φ = 22285012.

The previous prime is 22297313. The next prime is 22297333. The reversal of 22297321 is 12379222.

22297321 = T₃₈₅₄ + T₃₈₅₅ + T₃₈₅₆.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22297321 - 2³ = 22297313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22297321.

It is not an unprimeable number, because it can be changed into a prime (22297351) 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 3 ways as a sum of consecutive naturals, for example, 2845 + ... + 7258.

It is an arithmetic number, because the mean of its divisors is an integer number (5577408).

Almost surely, 2^22297321 is an apocalyptic number.

22297321 is the 3856-th centered triangular number.

It is an amenable number.

22297321 is a deficient number, since it is larger than the sum of its proper divisors (12311).

22297321 is a wasteful number, since it uses less digits than its factorization.

22297321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12310.

The product of its digits is 3024, while the sum is 28.

The square root of 22297321 is about 4722.0039178298. The cubic root of 22297321 is about 281.4605694860.

The spelling of 22297321 in words is "twenty-two million, two hundred ninety-seven thousand, three hundred twenty-one".