221197759859 has 8 divisors (see below), whose sum is σ = 232844148480. Its totient is φ = 209551811400.

The previous prime is 221197759819. The next prime is 221197759889. The reversal of 221197759859 is 958957791122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221197759859 - 2¹⁶ = 221197694323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221197759795 and 221197759804.

It is not an unprimeable number, because it can be changed into a prime (221197759819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1615154 + ... + 1746744.

It is an arithmetic number, because the mean of its divisors is an integer number (29105518560).

Almost surely, 2^221197759859 is an apocalyptic number.

221197759859 is a deficient number, since it is larger than the sum of its proper divisors (11646388621).

221197759859 is a wasteful number, since it uses less digits than its factorization.

221197759859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220081.

The product of its digits is 28576800, while the sum is 65.

The spelling of 221197759859 in words is "two hundred twenty-one billion, one hundred ninety-seven million, seven hundred fifty-nine thousand, eight hundred fifty-nine".