213113263231 has 4 divisors (see below), whose sum is σ = 232487196264. Its totient is φ = 193739330200.

The previous prime is 213113263201. The next prime is 213113263261. The reversal of 213113263231 is 132362311312.

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

It is an interprime number because it is at equal distance from previous prime (213113263201) and next prime (213113263261).

It is a cyclic number.

It is not a de Polignac number, because 213113263231 - 2⁵ = 213113263199 is a prime.

It is a super-2 number, since 2×213113263231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213113263231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213113263201) 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, 9686966500 + ... + 9686966521.

It is an arithmetic number, because the mean of its divisors is an integer number (58121799066).

Almost surely, 2^213113263231 is an apocalyptic number.

213113263231 is a deficient number, since it is larger than the sum of its proper divisors (19373933033).

213113263231 is a wasteful number, since it uses less digits than its factorization.

213113263231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19373933032.

The product of its digits is 3888, while the sum is 28.

Adding to 213113263231 its reverse (132362311312), we get a palindrome (345475574543).

The spelling of 213113263231 in words is "two hundred thirteen billion, one hundred thirteen million, two hundred sixty-three thousand, two hundred thirty-one".