23243513 has 4 divisors (see below), whose sum is σ = 23347968. Its totient is φ = 23139060.

The previous prime is 23243497. The next prime is 23243543. The reversal of 23243513 is 31534232.

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 a cyclic number.

It is not a de Polignac number, because 23243513 - 2⁴ = 23243497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23243543) 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, 51893 + ... + 52338.

It is an arithmetic number, because the mean of its divisors is an integer number (5836992).

Almost surely, 2^23243513 is an apocalyptic number.

It is an amenable number.

23243513 is a deficient number, since it is larger than the sum of its proper divisors (104455).

23243513 is a wasteful number, since it uses less digits than its factorization.

23243513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104454.

The product of its digits is 2160, while the sum is 23.

The square root of 23243513 is about 4821.1526630050. The cubic root of 23243513 is about 285.3868267334.

Adding to 23243513 its reverse (31534232), we get a palindrome (54777745).

The spelling of 23243513 in words is "twenty-three million, two hundred forty-three thousand, five hundred thirteen".