13006521231 has 96 divisors (see below), whose sum is σ = 20919091200. Its totient is φ = 7155086400.

The previous prime is 13006521223. The next prime is 13006521251. The reversal of 13006521231 is 13212560031.

It is not a de Polignac number, because 13006521231 - 2³ = 13006521223 is a prime.

It is a super-2 number, since 2×13006521231² (a number of 21 digits) contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13006521251) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27153250 + ... + 27153728.

It is an arithmetic number, because the mean of its divisors is an integer number (217907200).

Almost surely, 2^13006521231 is an apocalyptic number.

13006521231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13006521231 is a deficient number, since it is larger than the sum of its proper divisors (7912569969).

13006521231 is a wasteful number, since it uses less digits than its factorization.

13006521231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The spelling of 13006521231 in words is "thirteen billion, six million, five hundred twenty-one thousand, two hundred thirty-one".