23115413 has 4 divisors (see below), whose sum is σ = 23270700. Its totient is φ = 22960128.

The previous prime is 23115409. The next prime is 23115451. The reversal of 23115413 is 31451132.

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 770884 + 22344529 = 878^2 + 4727^2 .

It is a cyclic number.

It is not a de Polignac number, because 23115413 - 2² = 23115409 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 (23115403) 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, 77420 + ... + 77717.

It is an arithmetic number, because the mean of its divisors is an integer number (5817675).

Almost surely, 2^23115413 is an apocalyptic number.

It is an amenable number.

23115413 is a deficient number, since it is larger than the sum of its proper divisors (155287).

23115413 is a wasteful number, since it uses less digits than its factorization.

23115413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155286.

The product of its digits is 360, while the sum is 20.

The square root of 23115413 is about 4807.8491032893. The cubic root of 23115413 is about 284.8615845772.

Adding to 23115413 its reverse (31451132), we get a palindrome (54566545).

The spelling of 23115413 in words is "twenty-three million, one hundred fifteen thousand, four hundred thirteen".