23202423221 has 4 divisors (see below), whose sum is σ = 23228005632. Its totient is φ = 23176840812.

The previous prime is 23202423199. The next prime is 23202423241. The reversal of 23202423221 is 12232420232.

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 23202423221 - 2¹⁸ = 23202161077 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 (23202423241) 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, 12789845 + ... + 12791658.

It is an arithmetic number, because the mean of its divisors is an integer number (5807001408).

Almost surely, 2^23202423221 is an apocalyptic number.

It is an amenable number.

23202423221 is a deficient number, since it is larger than the sum of its proper divisors (25582411).

23202423221 is an equidigital number, since it uses as much as digits as its factorization.

23202423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25582410.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 23202423221 its reverse (12232420232), we get a palindrome (35434843453).

The spelling of 23202423221 in words is "twenty-three billion, two hundred two million, four hundred twenty-three thousand, two hundred twenty-one".