13504531 has 2 divisors, whose sum is σ = 13504532. Its totient is φ = 13504530.

The previous prime is 13504529. The next prime is 13504541. The reversal of 13504531 is 13540531.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13540531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13504531 - 2¹ = 13504529 is a prime.

It is a super-2 number, since 2×13504531² = 364744715059922, which contains 22 as substring.

Together with 13504529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13504541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6752265 + 6752266.

It is an arithmetic number, because the mean of its divisors is an integer number (6752266).

Almost surely, 2^13504531 is an apocalyptic number.

13504531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13504531 is an equidigital number, since it uses as much as digits as its factorization.

13504531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 13504531 is about 3674.8511534483. The cubic root of 13504531 is about 238.1367937569.

The spelling of 13504531 in words is "thirteen million, five hundred four thousand, five hundred thirty-one".