203331042391 has 2 divisors, whose sum is σ = 203331042392. Its totient is φ = 203331042390.

The previous prime is 203331042379. The next prime is 203331042407. The reversal of 203331042391 is 193240133302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203331042391 - 2⁷ = 203331042263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203331042331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101665521195 + 101665521196.

It is an arithmetic number, because the mean of its divisors is an integer number (101665521196).

Almost surely, 2^203331042391 is an apocalyptic number.

203331042391 is a deficient number, since it is larger than the sum of its proper divisors (1).

203331042391 is an equidigital number, since it uses as much as digits as its factorization.

203331042391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 31.

Adding to 203331042391 its reverse (193240133302), we get a palindrome (396571175693).

The spelling of 203331042391 in words is "two hundred three billion, three hundred thirty-one million, forty-two thousand, three hundred ninety-one".