22731197 has 4 divisors (see below), whose sum is σ = 22773756. Its totient is φ = 22688640.

The previous prime is 22731167. The next prime is 22731211. The reversal of 22731197 is 79113722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5707321 + 17023876 = 2389^2 + 4126^2 .

It is a cyclic number.

It is not a de Polignac number, because 22731197 - 2⁸ = 22730941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22731167) 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, 20468 + ... + 21549.

It is an arithmetic number, because the mean of its divisors is an integer number (5693439).

Almost surely, 2^22731197 is an apocalyptic number.

It is an amenable number.

22731197 is a deficient number, since it is larger than the sum of its proper divisors (42559).

22731197 is an equidigital number, since it uses as much as digits as its factorization.

22731197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42558.

The product of its digits is 5292, while the sum is 32.

The square root of 22731197 is about 4767.7245096587. The cubic root of 22731197 is about 283.2744697402.

The spelling of 22731197 in words is "twenty-two million, seven hundred thirty-one thousand, one hundred ninety-seven".