221668675 has 12 divisors (see below), whose sum is σ = 275100696. Its totient is φ = 177185600.

The previous prime is 221668609. The next prime is 221668691. The reversal of 221668675 is 576866122.

221668675 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221668675 - 2¹⁵ = 221635907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34032 + ... + 40018.

It is an arithmetic number, because the mean of its divisors is an integer number (22925058).

Almost surely, 2^221668675 is an apocalyptic number.

221668675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221668675 is a deficient number, since it is larger than the sum of its proper divisors (53432021).

221668675 is a wasteful number, since it uses less digits than its factorization.

221668675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478 (or 7473 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 221668675 is about 14888.5417351734. The cubic root of 221668675 is about 605.2035150761.

The spelling of 221668675 in words is "two hundred twenty-one million, six hundred sixty-eight thousand, six hundred seventy-five".