221088275 has 24 divisors (see below), whose sum is σ = 292927680. Its totient is φ = 165036960.

The previous prime is 221088233. The next prime is 221088299. The reversal of 221088275 is 572880122.

It is not a de Polignac number, because 221088275 - 2¹⁴ = 221071891 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28352 + ... + 35298.

It is an arithmetic number, because the mean of its divisors is an integer number (12205320).

Almost surely, 2^221088275 is an apocalyptic number.

221088275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221088275 is a deficient number, since it is larger than the sum of its proper divisors (71839405).

221088275 is a wasteful number, since it uses less digits than its factorization.

221088275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7043 (or 7038 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 221088275 is about 14869.0374604411. The cubic root of 221088275 is about 604.6748474786.

The spelling of 221088275 in words is "two hundred twenty-one million, eighty-eight thousand, two hundred seventy-five".