221850244 has 72 divisors (see below), whose sum is σ = 504348768. Its totient is φ = 84389760.

The previous prime is 221850197. The next prime is 221850247. The reversal of 221850244 is 442058122.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (221850247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91512 + ... + 93904.

It is an arithmetic number, because the mean of its divisors is an integer number (7004844).

Almost surely, 2^221850244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221850244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252174384).

221850244 is an abundant number, since it is smaller than the sum of its proper divisors (282498524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221850244 is a wasteful number, since it uses less digits than its factorization.

221850244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465 (or 2456 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 221850244 is about 14894.6380956370. The cubic root of 221850244 is about 605.3687108847.

The spelling of 221850244 in words is "two hundred twenty-one million, eight hundred fifty thousand, two hundred forty-four".