221952275 has 12 divisors (see below), whose sum is σ = 276275472. Its totient is φ = 176881440.

The previous prime is 221952259. The next prime is 221952293. The reversal of 221952275 is 572259122.

It is not a de Polignac number, because 221952275 - 2⁴ = 221952259 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, 10304 + ... + 23453.

It is an arithmetic number, because the mean of its divisors is an integer number (23022956).

Almost surely, 2^221952275 is an apocalyptic number.

221952275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

221952275 is a deficient number, since it is larger than the sum of its proper divisors (54323197).

221952275 is a wasteful number, since it uses less digits than its factorization.

221952275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34030 (or 34025 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 221952275 is about 14898.0627935312. The cubic root of 221952275 is about 605.4615015698.

The spelling of 221952275 in words is "two hundred twenty-one million, nine hundred fifty-two thousand, two hundred seventy-five".