23242221 has 24 divisors (see below), whose sum is σ = 35197344. Its totient is φ = 15325200.

The previous prime is 23242211. The next prime is 23242223. The reversal of 23242221 is 12224232.

It is not a de Polignac number, because 23242221 - 2⁵ = 23242189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23242194 and 23242203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23242223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24070 + ... + 25016.

It is an arithmetic number, because the mean of its divisors is an integer number (1466556).

Almost surely, 2^23242221 is an apocalyptic number.

It is an amenable number.

23242221 is a deficient number, since it is larger than the sum of its proper divisors (11955123).

23242221 is an equidigital number, since it uses as much as digits as its factorization.

23242221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063 (or 1051 counting only the distinct ones).

The product of its digits is 384, while the sum is 18.

The square root of 23242221 is about 4821.0186682899. The cubic root of 23242221 is about 285.3815388550.

Adding to 23242221 its reverse (12224232), we get a palindrome (35466453).

The spelling of 23242221 in words is "twenty-three million, two hundred forty-two thousand, two hundred twenty-one".