221993675 has 6 divisors (see below), whose sum is σ = 275272188. Its totient is φ = 177594920.

The previous prime is 221993671. The next prime is 221993683. The reversal of 221993675 is 576399122.

It is not a de Polignac number, because 221993675 - 2² = 221993671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221993671) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 4439849 + ... + 4439898.

It is an arithmetic number, because the mean of its divisors is an integer number (45878698).

Almost surely, 2^221993675 is an apocalyptic number.

221993675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221993675 is a deficient number, since it is larger than the sum of its proper divisors (53278513).

221993675 is an equidigital number, since it uses as much as digits as its factorization.

221993675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8879757 (or 8879752 counting only the distinct ones).

The product of its digits is 204120, while the sum is 44.

The square root of 221993675 is about 14899.4521711370. The cubic root of 221993675 is about 605.4991441183.

The spelling of 221993675 in words is "two hundred twenty-one million, nine hundred ninety-three thousand, six hundred seventy-five".