108531865 has 16 divisors (see below), whose sum is σ = 140526288. Its totient is φ = 79992576.

The previous prime is 108531823. The next prime is 108531869. The reversal of 108531865 is 568135801.

It can be written as a sum of positive squares in 8 ways, for example, as 19927296 + 88604569 = 4464^2 + 9413^2 .

It is a cyclic number.

It is not a de Polignac number, because 108531865 - 2⁷ = 108531737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108531869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41167 + ... + 43723.

It is an arithmetic number, because the mean of its divisors is an integer number (8782893).

Almost surely, 2^108531865 is an apocalyptic number.

It is an amenable number.

108531865 is a deficient number, since it is larger than the sum of its proper divisors (31994423).

108531865 is a wasteful number, since it uses less digits than its factorization.

108531865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228.

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 108531865 is about 10417.8627846598. The cubic root of 108531865 is about 477.0007793866. Note that the first 3 decimals are identical.

The spelling of 108531865 in words is "one hundred eight million, five hundred thirty-one thousand, eight hundred sixty-five".