23031013 has 4 divisors (see below), whose sum is σ = 23040640. Its totient is φ = 23021388.

The previous prime is 23030999. The next prime is 23031061. The reversal of 23031013 is 31013032.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23031013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23030984 and 23031002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031083) 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, 1858 + ... + 7036.

It is an arithmetic number, because the mean of its divisors is an integer number (5760160).

Almost surely, 2^23031013 is an apocalyptic number.

It is an amenable number.

23031013 is a deficient number, since it is larger than the sum of its proper divisors (9627).

23031013 is an equidigital number, since it uses as much as digits as its factorization.

23031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9626.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 23031013 is about 4799.0637628604. The cubic root of 23031013 is about 284.5144620939.

Adding to 23031013 its reverse (31013032), we get a palindrome (54044045).

The spelling of 23031013 in words is "twenty-three million, thirty-one thousand, thirteen".