23321213 has 2 divisors, whose sum is σ = 23321214. Its totient is φ = 23321212.

The previous prime is 23321201. The next prime is 23321231. The reversal of 23321213 is 31212332.

Together with next prime (23321231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13853284 + 9467929 = 3722^2 + 3077^2 .

It is a cyclic number.

It is not a de Polignac number, because 23321213 - 2¹⁴ = 23304829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23321191 and 23321200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23321273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11660606 + 11660607.

It is an arithmetic number, because the mean of its divisors is an integer number (11660607).

Almost surely, 2^23321213 is an apocalyptic number.

It is an amenable number.

23321213 is a deficient number, since it is larger than the sum of its proper divisors (1).

23321213 is an equidigital number, since it uses as much as digits as its factorization.

23321213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 17.

The square root of 23321213 is about 4829.2041787442. The cubic root of 23321213 is about 285.7044765561.

Adding to 23321213 its reverse (31212332), we get a palindrome (54533545).

The spelling of 23321213 in words is "twenty-three million, three hundred twenty-one thousand, two hundred thirteen".