221755675 has 12 divisors (see below), whose sum is σ = 281685096. Its totient is φ = 173076800.

The previous prime is 221755637. The next prime is 221755691. The reversal of 221755675 is 576557122.

It is a de Polignac number, because none of the positive numbers 2^k-221755675 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 11 ways as a sum of consecutive naturals, for example, 107149 + ... + 109198.

It is an arithmetic number, because the mean of its divisors is an integer number (23473758).

Almost surely, 2^221755675 is an apocalyptic number.

221755675 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221755675 is a deficient number, since it is larger than the sum of its proper divisors (59929421).

221755675 is a wasteful number, since it uses less digits than its factorization.

221755675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216398 (or 216393 counting only the distinct ones).

The product of its digits is 147000, while the sum is 40.

The square root of 221755675 is about 14891.4631584677. The cubic root of 221755675 is about 605.2826810039.

The spelling of 221755675 in words is "two hundred twenty-one million, seven hundred fifty-five thousand, six hundred seventy-five".