221850243 has 6 divisors (see below), whose sum is σ = 320450364. Its totient is φ = 147900156.

The previous prime is 221850197. The next prime is 221850247. The reversal of 221850243 is 342058122.

It is not a de Polignac number, because 221850243 - 2⁸ = 221849987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221850247) 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 5 ways as a sum of consecutive naturals, for example, 12325005 + ... + 12325022.

It is an arithmetic number, because the mean of its divisors is an integer number (53408394).

Almost surely, 2^221850243 is an apocalyptic number.

221850243 is a deficient number, since it is larger than the sum of its proper divisors (98600121).

221850243 is a wasteful number, since it uses less digits than its factorization.

221850243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24650033 (or 24650030 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 221850243 is about 14894.6380620678. The cubic root of 221850243 is about 605.3687099752.

The spelling of 221850243 in words is "two hundred twenty-one million, eight hundred fifty thousand, two hundred forty-three".