23112813 has 4 divisors (see below), whose sum is σ = 30817088. Its totient is φ = 15408540.

The previous prime is 23112811. The next prime is 23112829. The reversal of 23112813 is 31821132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 23112813 - 2¹ = 23112811 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23112813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23112811) 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, 3852133 + ... + 3852138.

It is an arithmetic number, because the mean of its divisors is an integer number (7704272).

Almost surely, 2^23112813 is an apocalyptic number.

It is an amenable number.

23112813 is a deficient number, since it is larger than the sum of its proper divisors (7704275).

23112813 is an equidigital number, since it uses as much as digits as its factorization.

23112813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7704274.

The product of its digits is 288, while the sum is 21.

The square root of 23112813 is about 4807.5787045040. The cubic root of 23112813 is about 284.8509038554.

Adding to 23112813 its reverse (31821132), we get a palindrome (54933945).

The spelling of 23112813 in words is "twenty-three million, one hundred twelve thousand, eight hundred thirteen".