221230243 has 8 divisors (see below), whose sum is σ = 250787600. Its totient is φ = 193464288.

The previous prime is 221230211. The next prime is 221230267. The reversal of 221230243 is 342032122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221230243 - 2⁵ = 221230211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 221230243.

It is not an unprimeable number, because it can be changed into a prime (221230343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447588 + ... + 448081.

It is an arithmetic number, because the mean of its divisors is an integer number (31348450).

Almost surely, 2^221230243 is an apocalyptic number.

221230243 is a deficient number, since it is larger than the sum of its proper divisors (29557357).

221230243 is a wasteful number, since it uses less digits than its factorization.

221230243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895701.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 221230243 is about 14873.8106415269. The cubic root of 221230243 is about 604.8042469395.

Adding to 221230243 its reverse (342032122), we get a palindrome (563262365).

The spelling of 221230243 in words is "two hundred twenty-one million, two hundred thirty thousand, two hundred forty-three".