23123831 has 4 divisors (see below), whose sum is σ = 23152752. Its totient is φ = 23094912.

The previous prime is 23123827. The next prime is 23123833. The reversal of 23123831 is 13832132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23123831 - 2² = 23123827 is a prime.

It is a super-2 number, since 2×23123831² = 1069423120233122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23123797 and 23123806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123833) 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, 13226 + ... + 14871.

It is an arithmetic number, because the mean of its divisors is an integer number (5788188).

Almost surely, 2^23123831 is an apocalyptic number.

23123831 is a deficient number, since it is larger than the sum of its proper divisors (28921).

23123831 is an equidigital number, since it uses as much as digits as its factorization.

23123831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28920.

The product of its digits is 864, while the sum is 23.

The square root of 23123831 is about 4808.7244670494. The cubic root of 23123831 is about 284.8961599748.

Adding to 23123831 its reverse (13832132), we get a palindrome (36955963).

The spelling of 23123831 in words is "twenty-three million, one hundred twenty-three thousand, eight hundred thirty-one".