22320397 has 8 divisors (see below), whose sum is σ = 24916320. Its totient is φ = 19818960.

The previous prime is 22320391. The next prime is 22320433. The reversal of 22320397 is 79302322.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22320397 is a prime.

It is a super-3 number, since 3×22320397³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22320391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23122 + ... + 24067.

It is an arithmetic number, because the mean of its divisors is an integer number (3114540).

Almost surely, 2^22320397 is an apocalyptic number.

It is an amenable number.

22320397 is a deficient number, since it is larger than the sum of its proper divisors (2595923).

22320397 is a wasteful number, since it uses less digits than its factorization.

22320397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47243.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 22320397 is about 4724.4467400956. The cubic root of 22320397 is about 281.5576326382.

The spelling of 22320397 in words is "twenty-two million, three hundred twenty thousand, three hundred ninety-seven".