13187923231 has 8 divisors (see below), whose sum is σ = 15072717440. Its totient is φ = 11303330328.

The previous prime is 13187923211. The next prime is 13187923289. The reversal of 13187923231 is 13232978131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13187923231 - 2⁹ = 13187922719 is a prime.

It is a super-2 number, since 2×13187923231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13187923201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136120 + ... + 211906.

It is an arithmetic number, because the mean of its divisors is an integer number (1884089680).

Almost surely, 2^13187923231 is an apocalyptic number.

13187923231 is a deficient number, since it is larger than the sum of its proper divisors (1884794209).

13187923231 is an equidigital number, since it uses as much as digits as its factorization.

13187923231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100653.

The product of its digits is 54432, while the sum is 40.

The spelling of 13187923231 in words is "thirteen billion, one hundred eighty-seven million, nine hundred twenty-three thousand, two hundred thirty-one".