221668834 has 8 divisors (see below), whose sum is σ = 332902080. Its totient is φ = 110701476.

The previous prime is 221668819. The next prime is 221668859. The reversal of 221668834 is 438866122.

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, 64374 + ... + 67729.

It is an arithmetic number, because the mean of its divisors is an integer number (41612760).

Almost surely, 2^221668834 is an apocalyptic number.

221668834 is a deficient number, since it is larger than the sum of its proper divisors (111233246).

221668834 is a wasteful number, since it uses less digits than its factorization.

221668834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132944.

The product of its digits is 110592, while the sum is 40.

The square root of 221668834 is about 14888.5470748492. The cubic root of 221668834 is about 605.2036597776.

The spelling of 221668834 in words is "two hundred twenty-one million, six hundred sixty-eight thousand, eight hundred thirty-four".