221850213 has 16 divisors (see below), whose sum is σ = 335321280. Its totient is φ = 129337344.

The previous prime is 221850197. The next prime is 221850247. The reversal of 221850213 is 312058122.

221850213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221850213 - 2⁴ = 221850197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221850283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148956 + ... + 150437.

It is an arithmetic number, because the mean of its divisors is an integer number (20957580).

Almost surely, 2^221850213 is an apocalyptic number.

It is an amenable number.

221850213 is a deficient number, since it is larger than the sum of its proper divisors (113471067).

221850213 is a wasteful number, since it uses less digits than its factorization.

221850213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299428.

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

The square root of 221850213 is about 14894.6370549940. The cubic root of 221850213 is about 605.3686826879.

The spelling of 221850213 in words is "two hundred twenty-one million, eight hundred fifty thousand, two hundred thirteen".