23221229 has 4 divisors (see below), whose sum is σ = 23239584. Its totient is φ = 23202876.

The previous prime is 23221223. The next prime is 23221241. The reversal of 23221229 is 92212232.

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 23221229 - 2⁸ = 23220973 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 (23221223) 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, 7127 + ... + 9860.

It is an arithmetic number, because the mean of its divisors is an integer number (5809896).

Almost surely, 2^23221229 is an apocalyptic number.

It is an amenable number.

23221229 is a deficient number, since it is larger than the sum of its proper divisors (18355).

23221229 is a wasteful number, since it uses less digits than its factorization.

23221229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18354.

The product of its digits is 864, while the sum is 23.

The square root of 23221229 is about 4818.8410432385. The cubic root of 23221229 is about 285.2955956377.

The spelling of 23221229 in words is "twenty-three million, two hundred twenty-one thousand, two hundred twenty-nine".