23221213 has 8 divisors (see below), whose sum is σ = 23579136. Its totient is φ = 22866000.

The previous prime is 23221193. The next prime is 23221223. The reversal of 23221213 is 31212232.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23221213 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 7 ways as a sum of consecutive naturals, for example, 22008 + ... + 23038.

It is an arithmetic number, because the mean of its divisors is an integer number (2947392).

Almost surely, 2^23221213 is an apocalyptic number.

It is an amenable number.

23221213 is a deficient number, since it is larger than the sum of its proper divisors (357923).

23221213 is a wasteful number, since it uses less digits than its factorization.

23221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355.

The product of its digits is 144, while the sum is 16.

The square root of 23221213 is about 4818.8393830880. The cubic root of 23221213 is about 285.2955301125.

Adding to 23221213 its reverse (31212232), we get a palindrome (54433445).

The spelling of 23221213 in words is "twenty-three million, two hundred twenty-one thousand, two hundred thirteen".