221161682 has 8 divisors (see below), whose sum is σ = 379134336. Its totient is φ = 94783572.

The previous prime is 221161651. The next prime is 221161693. The reversal of 221161682 is 286161122.

221161682 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7898618 + ... + 7898645.

It is an arithmetic number, because the mean of its divisors is an integer number (47391792).

Almost surely, 2^221161682 is an apocalyptic number.

221161682 is a deficient number, since it is larger than the sum of its proper divisors (157972654).

221161682 is a wasteful number, since it uses less digits than its factorization.

221161682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15797272.

The product of its digits is 2304, while the sum is 29.

The square root of 221161682 is about 14871.5057072241. The cubic root of 221161682 is about 604.7417626129.

The spelling of 221161682 in words is "two hundred twenty-one million, one hundred sixty-one thousand, six hundred eighty-two".