23210221 has 8 divisors (see below), whose sum is σ = 23587200. Its totient is φ = 22836000.

The previous prime is 23210189. The next prime is 23210249. The reversal of 23210221 is 12201232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23210221 - 2⁵ = 23210189 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 (23210251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21820 + ... + 22858.

It is an arithmetic number, because the mean of its divisors is an integer number (2948400).

Almost surely, 2^23210221 is an apocalyptic number.

It is an amenable number.

23210221 is a deficient number, since it is larger than the sum of its proper divisors (376979).

23210221 is a wasteful number, since it uses less digits than its factorization.

23210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 23210221 is about 4817.6987244949. The cubic root of 23210221 is about 285.2505071499.

Adding to 23210221 its reverse (12201232), we get a palindrome (35411453).

The spelling of 23210221 in words is "twenty-three million, two hundred ten thousand, two hundred twenty-one".