221853201 has 4 divisors (see below), whose sum is σ = 295804272. Its totient is φ = 147902132.

The previous prime is 221853199. The next prime is 221853209. The reversal of 221853201 is 102358122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221853201 - 2¹ = 221853199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221853209) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 36975531 + ... + 36975536.

It is an arithmetic number, because the mean of its divisors is an integer number (73951068).

Almost surely, 2^221853201 is an apocalyptic number.

It is an amenable number.

221853201 is a deficient number, since it is larger than the sum of its proper divisors (73951071).

221853201 is an equidigital number, since it uses as much as digits as its factorization.

221853201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73951070.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 221853201 is about 14894.7373592152. The cubic root of 221853201 is about 605.3714004879.

The spelling of 221853201 in words is "two hundred twenty-one million, eight hundred fifty-three thousand, two hundred one".