23131230213 has 16 divisors (see below), whose sum is σ = 37958942336. Its totient is φ = 12201088320.

The previous prime is 23131230197. The next prime is 23131230233. The reversal of 23131230213 is 31203213132.

It is not a de Polignac number, because 23131230213 - 2⁴ = 23131230197 is a prime.

It is a super-2 number, since 2×23131230213² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 23131230213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131230233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42364618 + ... + 42365163.

It is an arithmetic number, because the mean of its divisors is an integer number (2372433896).

Almost surely, 2^23131230213 is an apocalyptic number.

It is an amenable number.

23131230213 is a deficient number, since it is larger than the sum of its proper divisors (14827712123).

23131230213 is a wasteful number, since it uses less digits than its factorization.

23131230213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84729804.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 23131230213 its reverse (31203213132), we get a palindrome (54334443345).

The spelling of 23131230213 in words is "twenty-three billion, one hundred thirty-one million, two hundred thirty thousand, two hundred thirteen".