203404304231 has 4 divisors (see below), whose sum is σ = 208365384864. Its totient is φ = 198443223600.

The previous prime is 203404304209. The next prime is 203404304293. The reversal of 203404304231 is 132403404302.

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

It is a cyclic number.

It is not a de Polignac number, because 203404304231 - 2³⁰ = 202330562407 is a prime.

It is a super-2 number, since 2×203404304231² (a number of 23 digits) contains 22 as substring.

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 203404304231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203404304731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2480540255 + ... + 2480540336.

It is an arithmetic number, because the mean of its divisors is an integer number (52091346216).

Almost surely, 2^203404304231 is an apocalyptic number.

203404304231 is a deficient number, since it is larger than the sum of its proper divisors (4961080633).

203404304231 is an equidigital number, since it uses as much as digits as its factorization.

203404304231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961080632.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 203404304231 its reverse (132403404302), we get a palindrome (335807708533).

The spelling of 203404304231 in words is "two hundred three billion, four hundred four million, three hundred four thousand, two hundred thirty-one".