23313513 has 16 divisors (see below), whose sum is σ = 34145280. Its totient is φ = 14083344.

The previous prime is 23313509. The next prime is 23313533. The reversal of 23313513 is 31531332.

It is not a de Polignac number, because 23313513 - 2² = 23313509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23313513.

It is not an unprimeable number, because it can be changed into a prime (23313533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7581 + ... + 10202.

It is an arithmetic number, because the mean of its divisors is an integer number (2134080).

Almost surely, 2^23313513 is an apocalyptic number.

23313513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23313513 is a deficient number, since it is larger than the sum of its proper divisors (10831767).

23313513 is a wasteful number, since it uses less digits than its factorization.

23313513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17828.

The product of its digits is 810, while the sum is 21.

The square root of 23313513 is about 4828.4068801210. The cubic root of 23313513 is about 285.6730292691.

Adding to 23313513 its reverse (31531332), we get a palindrome (54844845).

The spelling of 23313513 in words is "twenty-three million, three hundred thirteen thousand, five hundred thirteen".