23225234221 has 24 divisors (see below), whose sum is σ = 27315610560. Its totient is φ = 19343964672.

The previous prime is 23225234203. The next prime is 23225234237. The reversal of 23225234221 is 12243252232.

It is not a de Polignac number, because 23225234221 - 2¹⁵ = 23225201453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23225234221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23225234521) 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, 12294045 + ... + 12295933.

It is an arithmetic number, because the mean of its divisors is an integer number (1138150440).

Almost surely, 2^23225234221 is an apocalyptic number.

It is an amenable number.

23225234221 is a deficient number, since it is larger than the sum of its proper divisors (4090376339).

23225234221 is a wasteful number, since it uses less digits than its factorization.

23225234221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253 (or 3216 counting only the distinct ones).

The product of its digits is 11520, while the sum is 28.

Adding to 23225234221 its reverse (12243252232), we get a palindrome (35468486453).

The spelling of 23225234221 in words is "twenty-three billion, two hundred twenty-five million, two hundred thirty-four thousand, two hundred twenty-one".