23351213 has 4 divisors (see below), whose sum is σ = 23448348. Its totient is φ = 23254080.

The previous prime is 23351203. The next prime is 23351243. The reversal of 23351213 is 31215332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12866569 + 10484644 = 3587^2 + 3238^2 .

It is a cyclic number.

It is not a de Polignac number, because 23351213 - 2¹⁶ = 23285677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23351203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48206 + ... + 48687.

It is an arithmetic number, because the mean of its divisors is an integer number (5862087).

Almost surely, 2^23351213 is an apocalyptic number.

It is an amenable number.

23351213 is a deficient number, since it is larger than the sum of its proper divisors (97135).

23351213 is an equidigital number, since it uses as much as digits as its factorization.

23351213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97134.

The product of its digits is 540, while the sum is 20.

The square root of 23351213 is about 4832.3092823204. The cubic root of 23351213 is about 285.8269324745.

Adding to 23351213 its reverse (31215332), we get a palindrome (54566545).

The spelling of 23351213 in words is "twenty-three million, three hundred fifty-one thousand, two hundred thirteen".