203442440317 has 2 divisors, whose sum is σ = 203442440318. Its totient is φ = 203442440316.

The previous prime is 203442440303. The next prime is 203442440329. The reversal of 203442440317 is 713044244302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137923847161 + 65518593156 = 371381^2 + 255966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203442440317 is a prime.

It is a super-2 number, since 2×203442440317² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203442440347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101721220158 + 101721220159.

It is an arithmetic number, because the mean of its divisors is an integer number (101721220159).

Almost surely, 2^203442440317 is an apocalyptic number.

It is an amenable number.

203442440317 is a deficient number, since it is larger than the sum of its proper divisors (1).

203442440317 is an equidigital number, since it uses as much as digits as its factorization.

203442440317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 34.

Adding to 203442440317 its reverse (713044244302), we get a palindrome (916486684619).

The spelling of 203442440317 in words is "two hundred three billion, four hundred forty-two million, four hundred forty thousand, three hundred seventeen".