221768346 has 32 divisors (see below), whose sum is σ = 465707520. Its totient is φ = 70267824.

The previous prime is 221768321. The next prime is 221768353. The reversal of 221768346 is 643867122.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17565 + ... + 27423.

It is an arithmetic number, because the mean of its divisors is an integer number (14553360).

Almost surely, 2^221768346 is an apocalyptic number.

221768346 is an abundant number, since it is smaller than the sum of its proper divisors (243939174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221768346 is a wasteful number, since it uses less digits than its factorization.

221768346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050.

The product of its digits is 96768, while the sum is 39.

The square root of 221768346 is about 14891.8885974882. Note that the first 3 decimals coincide. The cubic root of 221768346 is about 605.2942092933.

The spelling of 221768346 in words is "two hundred twenty-one million, seven hundred sixty-eight thousand, three hundred forty-six".