108015921 has 24 divisors (see below), whose sum is σ = 170404416. Its totient is φ = 65530080.

The previous prime is 108015899. The next prime is 108015949. The reversal of 108015921 is 129510801.

It is not a de Polignac number, because 108015921 - 2⁶ = 108015857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (108015421) 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 23 ways as a sum of consecutive naturals, for example, 1806 + ... + 14808.

It is an arithmetic number, because the mean of its divisors is an integer number (7100184).

Almost surely, 2^108015921 is an apocalyptic number.

It is an amenable number.

108015921 is a deficient number, since it is larger than the sum of its proper divisors (62388495).

108015921 is a wasteful number, since it uses less digits than its factorization.

108015921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13093 (or 13090 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 108015921 is about 10393.0708166547. The cubic root of 108015921 is about 476.2437153778.

The spelling of 108015921 in words is "one hundred eight million, fifteen thousand, nine hundred twenty-one".