22397661 has 32 divisors (see below), whose sum is σ = 38989440. Its totient is φ = 12528000.

The previous prime is 22397623. The next prime is 22397707. The reversal of 22397661 is 16679322.

It is not a de Polignac number, because 22397661 - 2⁶ = 22397597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22397611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 961 + ... + 6761.

It is an arithmetic number, because the mean of its divisors is an integer number (1218420).

Almost surely, 2^22397661 is an apocalyptic number.

It is an amenable number.

22397661 is a deficient number, since it is larger than the sum of its proper divisors (16591779).

22397661 is a wasteful number, since it uses less digits than its factorization.

22397661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5834 (or 5828 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 22397661 is about 4732.6167180536. The cubic root of 22397661 is about 281.8821372555.

The spelling of 22397661 in words is "twenty-two million, three hundred ninety-seven thousand, six hundred sixty-one".