221679682 has 8 divisors (see below), whose sum is σ = 380022336. Its totient is φ = 95005572.

The previous prime is 221679659. The next prime is 221679709. The reversal of 221679682 is 286976122.

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

It is a super-2 number, since 2×221679682² = 98283762823242248, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7917118 + ... + 7917145.

It is an arithmetic number, because the mean of its divisors is an integer number (47502792).

Almost surely, 2^221679682 is an apocalyptic number.

221679682 is a deficient number, since it is larger than the sum of its proper divisors (158342654).

221679682 is a wasteful number, since it uses less digits than its factorization.

221679682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15834272.

The product of its digits is 145152, while the sum is 43.

The square root of 221679682 is about 14888.9113772633. The cubic root of 221679682 is about 605.2135320753.

The spelling of 221679682 in words is "two hundred twenty-one million, six hundred seventy-nine thousand, six hundred eighty-two".