203402030231 has 4 divisors (see below), whose sum is σ = 203465855832. Its totient is φ = 203338204632.

The previous prime is 203402030191. The next prime is 203402030261. The reversal of 203402030231 is 132030204302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203402030231 is a prime.

It is a super-2 number, since 2×203402030231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203402030261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31908020 + ... + 31914393.

It is an arithmetic number, because the mean of its divisors is an integer number (50866463958).

Almost surely, 2^203402030231 is an apocalyptic number.

203402030231 is a deficient number, since it is larger than the sum of its proper divisors (63825601).

203402030231 is an equidigital number, since it uses as much as digits as its factorization.

203402030231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63825600.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 203402030231 its reverse (132030204302), we get a palindrome (335432234533).

The spelling of 203402030231 in words is "two hundred three billion, four hundred two million, thirty thousand, two hundred thirty-one".