13681513031 has 2 divisors, whose sum is σ = 13681513032. Its totient is φ = 13681513030.

The previous prime is 13681512979. The next prime is 13681513067. The reversal of 13681513031 is 13031518631.

It is a strong prime.

It is an emirp because it is prime and its reverse (13031518631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13681513031 - 2¹⁸ = 13681250887 is a prime.

It is a super-2 number, since 2×13681513031² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13681516031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6840756515 + 6840756516.

It is an arithmetic number, because the mean of its divisors is an integer number (6840756516).

Almost surely, 2^13681513031 is an apocalyptic number.

13681513031 is a deficient number, since it is larger than the sum of its proper divisors (1).

13681513031 is an equidigital number, since it uses as much as digits as its factorization.

13681513031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 13681513031 in words is "thirteen billion, six hundred eighty-one million, five hundred thirteen thousand, thirty-one".