108531 has 12 divisors (see below), whose sum is σ = 162240. Its totient is φ = 69840.

The previous prime is 108529. The next prime is 108533. The reversal of 108531 is 135801.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (108529) and next prime (108533).

It is not a de Polignac number, because 108531 - 2¹ = 108529 is a prime.

It is a super-2 number, since 2×108531² = 23557955922, which contains 22 as substring.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (108533) 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, 85 + ... + 473.

It is an arithmetic number, because the mean of its divisors is an integer number (13520).

2¹⁰⁸⁵³¹ is an apocalyptic number.

108531 is a deficient number, since it is larger than the sum of its proper divisors (53709).

108531 is a wasteful number, since it uses less digits than its factorization.

108531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 108531 is about 329.4404346767. The cubic root of 108531 is about 47.6999512150.

The spelling of 108531 in words is "one hundred eight thousand, five hundred thirty-one".