221002243 has 32 divisors (see below), whose sum is σ = 300096000. Its totient is φ = 157489920.

The previous prime is 221002231. The next prime is 221002273. The reversal of 221002243 is 342200122.

It is not a de Polignac number, because 221002243 - 2⁵ = 221002211 is a prime.

It is a super-2 number, since 2×221002243² = 97683982822062098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221002273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39823 + ... + 45031.

It is an arithmetic number, because the mean of its divisors is an integer number (9378000).

Almost surely, 2^221002243 is an apocalyptic number.

221002243 is a deficient number, since it is larger than the sum of its proper divisors (79093757).

221002243 is a wasteful number, since it uses less digits than its factorization.

221002243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 221002243 is about 14866.1441873809. The cubic root of 221002243 is about 604.5964050018.

Adding to 221002243 its reverse (342200122), we get a palindrome (563202365).

The spelling of 221002243 in words is "two hundred twenty-one million, two thousand, two hundred forty-three".