23115311 has 4 divisors (see below), whose sum is σ = 23125752. Its totient is φ = 23104872.

The previous prime is 23115271. The next prime is 23115319. The reversal of 23115311 is 11351132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23115311 - 2⁶ = 23115247 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 23115311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440 + ... + 6813.

It is an arithmetic number, because the mean of its divisors is an integer number (5781438).

Almost surely, 2^23115311 is an apocalyptic number.

23115311 is a deficient number, since it is larger than the sum of its proper divisors (10441).

23115311 is an equidigital number, since it uses as much as digits as its factorization.

23115311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10440.

The product of its digits is 90, while the sum is 17.

The square root of 23115311 is about 4807.8384956236. The cubic root of 23115311 is about 284.8611655794.

Adding to 23115311 its reverse (11351132), we get a palindrome (34466443).

The spelling of 23115311 in words is "twenty-three million, one hundred fifteen thousand, three hundred eleven".