13213836231 has 16 divisors (see below), whose sum is σ = 18031808256. Its totient is φ = 8602626816.

The previous prime is 13213836227. The next prime is 13213836239. The reversal of 13213836231 is 13263831231.

It is not a de Polignac number, because 13213836231 - 2² = 13213836227 is a prime.

It is a super-2 number, since 2×13213836231² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13213836192 and 13213836201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213836239) 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, 1071406 + ... + 1083668.

It is an arithmetic number, because the mean of its divisors is an integer number (1126988016).

Almost surely, 2^13213836231 is an apocalyptic number.

13213836231 is a deficient number, since it is larger than the sum of its proper divisors (4817972025).

13213836231 is a wasteful number, since it uses less digits than its factorization.

13213836231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20662.

The product of its digits is 15552, while the sum is 33.

Subtracting 13213836231 from its reverse (13263831231), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 13213836231 in words is "thirteen billion, two hundred thirteen million, eight hundred thirty-six thousand, two hundred thirty-one".