13505850531 has 12 divisors (see below), whose sum is σ = 19512109552. Its totient is φ = 9002211696.

The previous prime is 13505850517. The next prime is 13505850559.

13505850531 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 13505850531 - 2⁷ = 13505850403 is a prime.

It is a super-2 number, since 2×13505850531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13505850571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89071 + ... + 186936.

Almost surely, 2^13505850531 is an apocalyptic number.

13505850531 is a deficient number, since it is larger than the sum of its proper divisors (6006259021).

13505850531 is a wasteful number, since it uses less digits than its factorization.

13505850531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281450 (or 281447 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 13505850531 in words is "thirteen billion, five hundred five million, eight hundred fifty thousand, five hundred thirty-one".