221494675 has 6 divisors (see below), whose sum is σ = 274653428. Its totient is φ = 177195720.

The previous prime is 221494633. The next prime is 221494681. The reversal of 221494675 is 576494122.

It is not a de Polignac number, because 221494675 - 2²⁵ = 187940243 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 4429869 + ... + 4429918.

Almost surely, 2^221494675 is an apocalyptic number.

221494675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221494675 is a deficient number, since it is larger than the sum of its proper divisors (53158753).

221494675 is an equidigital number, since it uses as much as digits as its factorization.

221494675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8859797 (or 8859792 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 221494675 is about 14882.6971681883. The cubic root of 221494675 is about 605.0451210571.

The spelling of 221494675 in words is "two hundred twenty-one million, four hundred ninety-four thousand, six hundred seventy-five".