23231012209 has 4 divisors (see below), whose sum is σ = 23248599460. Its totient is φ = 23213424960.

The previous prime is 23231012197. The next prime is 23231012243. The reversal of 23231012209 is 90221013232.

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 20254982400 + 2976029809 = 142320^2 + 54553^2 .

It is a cyclic number.

It is not a de Polignac number, because 23231012209 - 2⁵ = 23231012177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23231012809) 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, 8791644 + ... + 8794285.

It is an arithmetic number, because the mean of its divisors is an integer number (5812149865).

Almost surely, 2^23231012209 is an apocalyptic number.

It is an amenable number.

23231012209 is a deficient number, since it is larger than the sum of its proper divisors (17587251).

23231012209 is a wasteful number, since it uses less digits than its factorization.

23231012209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17587250.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 23231012209 in words is "twenty-three billion, two hundred thirty-one million, twelve thousand, two hundred nine".