221868203 has 4 divisors (see below), whose sum is σ = 221903808. Its totient is φ = 221832600.

The previous prime is 221868167. The next prime is 221868217. The reversal of 221868203 is 302868122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221868203 - 2¹⁶ = 221802667 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221868203.

It is not an unprimeable number, because it can be changed into a prime (221868503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5723 + ... + 21828.

It is an arithmetic number, because the mean of its divisors is an integer number (55475952).

Almost surely, 2^221868203 is an apocalyptic number.

221868203 is a deficient number, since it is larger than the sum of its proper divisors (35605).

221868203 is an equidigital number, since it uses as much as digits as its factorization.

221868203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35604.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 221868203 is about 14895.2409513912. The cubic root of 221868203 is about 605.3850455123.

The spelling of 221868203 in words is "two hundred twenty-one million, eight hundred sixty-eight thousand, two hundred three".