23421213 has 24 divisors (see below), whose sum is σ = 35250176. Its totient is φ = 14968800.

The previous prime is 23421173. The next prime is 23421217. The reversal of 23421213 is 31212432.

It is not a de Polignac number, because 23421213 - 2⁶ = 23421149 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 (23421217) 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, 35103 + ... + 35763.

Almost surely, 2^23421213 is an apocalyptic number.

It is an amenable number.

23421213 is a deficient number, since it is larger than the sum of its proper divisors (11828963).

23421213 is a wasteful number, since it uses less digits than its factorization.

23421213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825 (or 822 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 23421213 is about 4839.5467763004. The cubic root of 23421213 is about 286.1122556386.

Adding to 23421213 its reverse (31212432), we get a palindrome (54633645).

The spelling of 23421213 in words is "twenty-three million, four hundred twenty-one thousand, two hundred thirteen".