108640221 has 16 divisors (see below), whose sum is σ = 146448000. Its totient is φ = 71634368.

The previous prime is 108640219. The next prime is 108640229. The reversal of 108640221 is 122046801.

It is a cyclic number.

It is not a de Polignac number, because 108640221 - 2¹ = 108640219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 108640191 and 108640200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108640229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160135 + ... + 160811.

It is an arithmetic number, because the mean of its divisors is an integer number (9153000).

Almost surely, 2^108640221 is an apocalyptic number.

It is an amenable number.

108640221 is a deficient number, since it is larger than the sum of its proper divisors (37807779).

108640221 is a wasteful number, since it uses less digits than its factorization.

108640221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 108640221 is about 10423.0619781329. The cubic root of 108640221 is about 477.1594692032.

The spelling of 108640221 in words is "one hundred eight million, six hundred forty thousand, two hundred twenty-one".