203043421 has 8 divisors (see below), whose sum is σ = 232182720. Its totient is φ = 173937408.

The previous prime is 203043419. The next prime is 203043469. The reversal of 203043421 is 124340302.

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 203043421 - 2¹ = 203043419 is a prime.

It is a super-2 number, since 2×203043421² = 82453261622766482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203043221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6525 + ... + 21181.

It is an arithmetic number, because the mean of its divisors is an integer number (29022840).

Almost surely, 2^203043421 is an apocalyptic number.

It is an amenable number.

203043421 is a deficient number, since it is larger than the sum of its proper divisors (29139299).

203043421 is a wasteful number, since it uses less digits than its factorization.

203043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16643.

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

The square root of 203043421 is about 14249.3305456783. The cubic root of 203043421 is about 587.7549661998.

Adding to 203043421 its reverse (124340302), we get a palindrome (327383723).

It can be divided in two parts, 2030 and 43421, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 203043421 in words is "two hundred three million, forty-three thousand, four hundred twenty-one".