13532531 has 6 divisors (see below), whose sum is σ = 14016132. Its totient is φ = 13065080.

The previous prime is 13532513. The next prime is 13532537. The reversal of 13532531 is 13523531.

It is a de Polignac number, because none of the positive numbers 2^k-13532531 is a prime.

It is a super-2 number, since 2×13532531² = 366258790531922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13532497 and 13532506.

It is not an unprimeable number, because it can be changed into a prime (13532537) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7205 + ... + 8886.

It is an arithmetic number, because the mean of its divisors is an integer number (2336022).

Almost surely, 2^13532531 is an apocalyptic number.

13532531 is a deficient number, since it is larger than the sum of its proper divisors (483601).

13532531 is an equidigital number, since it uses as much as digits as its factorization.

13532531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16149 (or 16120 counting only the distinct ones).

The product of its digits is 1350, while the sum is 23.

The square root of 13532531 is about 3678.6588588778. The cubic root of 13532531 is about 238.3012626850.

The spelling of 13532531 in words is "thirteen million, five hundred thirty-two thousand, five hundred thirty-one".