203040421 has 8 divisors (see below), whose sum is σ = 209772288. Its totient is φ = 196320000.

The previous prime is 203040419. The next prime is 203040427. The reversal of 203040421 is 124040302.

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 203040421 - 2¹ = 203040419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203040395 and 203040404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203040427) 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, 47586 + ... + 51676.

It is an arithmetic number, because the mean of its divisors is an integer number (26221536).

Almost surely, 2^203040421 is an apocalyptic number.

It is an amenable number.

203040421 is a deficient number, since it is larger than the sum of its proper divisors (6731867).

203040421 is a wasteful number, since it uses less digits than its factorization.

203040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723.

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

The square root of 203040421 is about 14249.2252771861. The cubic root of 203040421 is about 587.7520714601.

Adding to 203040421 its reverse (124040302), we get a palindrome (327080723).

The spelling of 203040421 in words is "two hundred three million, forty thousand, four hundred twenty-one".