13605515431 has 2 divisors, whose sum is σ = 13605515432. Its totient is φ = 13605515430.

The previous prime is 13605515359. The next prime is 13605515447. The reversal of 13605515431 is 13451550631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13605515431 - 2¹⁵ = 13605482663 is a prime.

It is a super-2 number, since 2×13605515431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13605515731) 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 as a sum of consecutive naturals, namely, 6802757715 + 6802757716.

It is an arithmetic number, because the mean of its divisors is an integer number (6802757716).

Almost surely, 2^13605515431 is an apocalyptic number.

13605515431 is a deficient number, since it is larger than the sum of its proper divisors (1).

13605515431 is an equidigital number, since it uses as much as digits as its factorization.

13605515431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 34.

The spelling of 13605515431 in words is "thirteen billion, six hundred five million, five hundred fifteen thousand, four hundred thirty-one".