13539804531 has 24 divisors (see below), whose sum is σ = 20379790032. Its totient is φ = 7984152000.

The previous prime is 13539804493. The next prime is 13539804557. The reversal of 13539804531 is 13540893531.

It is not a de Polignac number, because 13539804531 - 2¹¹ = 13539802483 is a prime.

It is a super-2 number, since 2×13539804531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13539804431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490620 + ... + 517481.

It is an arithmetic number, because the mean of its divisors is an integer number (849157918).

Almost surely, 2^13539804531 is an apocalyptic number.

13539804531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13539804531 is a deficient number, since it is larger than the sum of its proper divisors (6839985501).

13539804531 is a wasteful number, since it uses less digits than its factorization.

13539804531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008163 (or 1008152 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 13539804531 in words is "thirteen billion, five hundred thirty-nine million, eight hundred four thousand, five hundred thirty-one".