13512493387831 has 4 divisors (see below), whose sum is σ = 13638778372872. Its totient is φ = 13386208402792.

The previous prime is 13512493387801. The next prime is 13512493387847. The reversal of 13512493387831 is 13878339421531.

13512493387831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13512493387831 - 2¹⁹ = 13512492863543 is a prime.

It is a super-2 number, since 2×13512493387831² (a number of 27 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 (13512493387801) 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, 63142492360 + ... + 63142492573.

It is an arithmetic number, because the mean of its divisors is an integer number (3409694593218).

Almost surely, 2^{13512493387831} is an apocalyptic number.

13512493387831 is a deficient number, since it is larger than the sum of its proper divisors (126284985041).

13512493387831 is a wasteful number, since it uses less digits than its factorization.

13512493387831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126284985040.

The product of its digits is 13063680, while the sum is 58.

The spelling of 13512493387831 in words is "thirteen trillion, five hundred twelve billion, four hundred ninety-three million, three hundred eighty-seven thousand, eight hundred thirty-one".