23213212031 has 4 divisors (see below), whose sum is σ = 23366942064. Its totient is φ = 23059482000.

The previous prime is 23213212013. The next prime is 23213212051. The reversal of 23213212031 is 13021231232.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23213212031 is a prime.

It is a super-2 number, since 2×23213212031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23213211994 and 23213212012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213212051) 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, 76864790 + ... + 76865091.

It is an arithmetic number, because the mean of its divisors is an integer number (5841735516).

Almost surely, 2^23213212031 is an apocalyptic number.

23213212031 is a deficient number, since it is larger than the sum of its proper divisors (153730033).

23213212031 is a wasteful number, since it uses less digits than its factorization.

23213212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153730032.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23213212031 its reverse (13021231232), we get a palindrome (36234443263).

The spelling of 23213212031 in words is "twenty-three billion, two hundred thirteen million, two hundred twelve thousand, thirty-one".