22323661 has 4 divisors (see below), whose sum is σ = 22334400. Its totient is φ = 22312924.

The previous prime is 22323647. The next prime is 22323667. The reversal of 22323661 is 16632322.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 22323661 - 2²¹ = 20226509 is a prime.

It is a super-3 number, since 3×22323661³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22323667) 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, 1141 + ... + 6778.

It is an arithmetic number, because the mean of its divisors is an integer number (5583600).

Almost surely, 2^22323661 is an apocalyptic number.

It is an amenable number.

22323661 is a deficient number, since it is larger than the sum of its proper divisors (10739).

22323661 is an equidigital number, since it uses as much as digits as its factorization.

22323661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738.

The product of its digits is 2592, while the sum is 25.

The square root of 22323661 is about 4724.7921647412. The cubic root of 22323661 is about 281.5713563983.

Adding to 22323661 its reverse (16632322), we get a palindrome (38955983).

The spelling of 22323661 in words is "twenty-two million, three hundred twenty-three thousand, six hundred sixty-one".