202303421 has 4 divisors (see below), whose sum is σ = 203023644. Its totient is φ = 201583200.

The previous prime is 202303411. The next prime is 202303441. The reversal of 202303421 is 124303202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 174530521 + 27772900 = 13211^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 202303421 - 2¹⁴ = 202287037 is a prime.

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 202303421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202303411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359690 + ... + 360251.

It is an arithmetic number, because the mean of its divisors is an integer number (50755911).

Almost surely, 2^202303421 is an apocalyptic number.

It is an amenable number.

202303421 is a deficient number, since it is larger than the sum of its proper divisors (720223).

202303421 is an equidigital number, since it uses as much as digits as its factorization.

202303421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720222.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 202303421 is about 14223.3407116612. The cubic root of 202303421 is about 587.0400647120.

Adding to 202303421 its reverse (124303202), we get a palindrome (326606623).

The spelling of 202303421 in words is "two hundred two million, three hundred three thousand, four hundred twenty-one".