203431034321 has 2 divisors, whose sum is σ = 203431034322. Its totient is φ = 203431034320.

The previous prime is 203431034249. The next prime is 203431034333. The reversal of 203431034321 is 123430134302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201812983696 + 1618050625 = 449236^2 + 40225^2 .

It is a cyclic number.

It is not a de Polignac number, because 203431034321 - 2³⁰ = 202357292497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (203431034381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101715517160 + 101715517161.

It is an arithmetic number, because the mean of its divisors is an integer number (101715517161).

Almost surely, 2^203431034321 is an apocalyptic number.

It is an amenable number.

203431034321 is a deficient number, since it is larger than the sum of its proper divisors (1).

203431034321 is an equidigital number, since it uses as much as digits as its factorization.

203431034321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 203431034321 its reverse (123430134302), we get a palindrome (326861168623).

The spelling of 203431034321 in words is "two hundred three billion, four hundred thirty-one million, thirty-four thousand, three hundred twenty-one".