221341768 has 16 divisors (see below), whose sum is σ = 439428780. Its totient is φ = 104160768.

The previous prime is 221341741. The next prime is 221341777. The reversal of 221341768 is 867143122.

It can be written as a sum of positive squares in 2 ways, for example, as 202834564 + 18507204 = 14242^2 + 4302^2 .

It is a super-2 number, since 2×221341768² = 97984356522731648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 813621 + ... + 813892.

Almost surely, 2^221341768 is an apocalyptic number.

It is an amenable number.

221341768 is a deficient number, since it is larger than the sum of its proper divisors (218087012).

221341768 is a wasteful number, since it uses less digits than its factorization.

221341768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627536 (or 1627532 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 221341768 is about 14877.5592084186. The cubic root of 221341768 is about 604.9058597232.

The spelling of 221341768 in words is "two hundred twenty-one million, three hundred forty-one thousand, seven hundred sixty-eight".