13011544231 has 12 divisors (see below), whose sum is σ = 15657806520. Its totient is φ = 10768173360.

The previous prime is 13011544213. The next prime is 13011544241. The reversal of 13011544231 is 13244511031.

It is not a de Polignac number, because 13011544231 - 2²⁵ = 12977989799 is a prime.

It is a super-2 number, since 2×13011544231² (a number of 21 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 = 13011544196 and 13011544205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13011544211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4576885 + ... + 4579726.

It is an arithmetic number, because the mean of its divisors is an integer number (1304817210).

Almost surely, 2^13011544231 is an apocalyptic number.

13011544231 is a deficient number, since it is larger than the sum of its proper divisors (2646262289).

13011544231 is an equidigital number, since it uses as much as digits as its factorization.

13011544231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9156654 (or 9156647 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The spelling of 13011544231 in words is "thirteen billion, eleven million, five hundred forty-four thousand, two hundred thirty-one".