23224221 has 6 divisors (see below), whose sum is σ = 33546110. Its totient is φ = 15482808.

The previous prime is 23224219. The next prime is 23224231. The reversal of 23224221 is 12242232.

It can be written as a sum of positive squares in only one way, i.e., 21958596 + 1265625 = 4686^2 + 1125^2 .

It is not a de Polignac number, because 23224221 - 2¹ = 23224219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23224194 and 23224203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23224211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1290226 + ... + 1290243.

Almost surely, 2^23224221 is an apocalyptic number.

It is an amenable number.

23224221 is a deficient number, since it is larger than the sum of its proper divisors (10321889).

23224221 is a wasteful number, since it uses less digits than its factorization.

23224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2580475 (or 2580472 counting only the distinct ones).

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

The square root of 23224221 is about 4819.1514813295. The cubic root of 23224221 is about 285.3078483306.

Adding to 23224221 its reverse (12242232), we get a palindrome (35466453).

It can be divided in two parts, 2 and 3224221, that added together give a palindrome (3224223).

The spelling of 23224221 in words is "twenty-three million, two hundred twenty-four thousand, two hundred twenty-one".