202221243 has 24 divisors (see below), whose sum is σ = 342851808. Its totient is φ = 112430592.

The previous prime is 202221233. The next prime is 202221251. The reversal of 202221243 is 342122202.

202221243 is a `hidden beast` number, since 202 + 221 + 243 = 666.

It is not a de Polignac number, because 202221243 - 2²⁰ = 201172667 is a prime.

It is a super-2 number, since 2×202221243² = 81786862240930098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (202221203) 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, 41046 + ... + 45707.

It is an arithmetic number, because the mean of its divisors is an integer number (14285492).

Almost surely, 2^202221243 is an apocalyptic number.

202221243 is a deficient number, since it is larger than the sum of its proper divisors (140630565).

202221243 is a wasteful number, since it uses less digits than its factorization.

202221243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86803 (or 86800 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 202221243 is about 14220.4515751083. The cubic root of 202221243 is about 586.9605664484.

Adding to 202221243 its reverse (342122202), we get a palindrome (544343445).

It can be divided in two parts, 202 and 221243, that added together give a triangular number (221445 = T₆₆₅).

The spelling of 202221243 in words is "two hundred two million, two hundred twenty-one thousand, two hundred forty-three".