859839990221 has 16 divisors (see below), whose sum is σ = 869296147200. Its totient is φ = 850439616000.

The previous prime is 859839990209. The next prime is 859839990227. The reversal of 859839990221 is 122099938958.

It is a cyclic number.

It is not a de Polignac number, because 859839990221 - 2³⁰ = 858766248397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859839990227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43616915 + ... + 43636623.

It is an arithmetic number, because the mean of its divisors is an integer number (54331009200).

Almost surely, 2^859839990221 is an apocalyptic number.

It is an amenable number.

859839990221 is a deficient number, since it is larger than the sum of its proper divisors (9456156979).

859839990221 is a wasteful number, since it uses less digits than its factorization.

859839990221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21100.

The product of its (nonzero) digits is 25194240, while the sum is 65.

The spelling of 859839990221 in words is "eight hundred fifty-nine billion, eight hundred thirty-nine million, nine hundred ninety thousand, two hundred twenty-one".