22731297 has 4 divisors (see below), whose sum is σ = 30308400. Its totient is φ = 15154196.

The previous prime is 22731287. The next prime is 22731299. The reversal of 22731297 is 79213722.

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 22731297 - 2⁴ = 22731281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22731299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3788547 + ... + 3788552.

It is an arithmetic number, because the mean of its divisors is an integer number (7577100).

Almost surely, 2^22731297 is an apocalyptic number.

It is an amenable number.

22731297 is a deficient number, since it is larger than the sum of its proper divisors (7577103).

22731297 is an equidigital number, since it uses as much as digits as its factorization.

22731297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7577102.

The product of its digits is 10584, while the sum is 33.

The square root of 22731297 is about 4767.7349968303. The cubic root of 22731297 is about 283.2748851371.

It can be divided in two parts, 2273 and 1297, that added together give a triangular number (3570 = T₈₄).

The spelling of 22731297 in words is "twenty-two million, seven hundred thirty-one thousand, two hundred ninety-seven".