203115323503 has 2 divisors, whose sum is σ = 203115323504. Its totient is φ = 203115323502.

The previous prime is 203115323497. The next prime is 203115323533. The reversal of 203115323503 is 305323511302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203115323503 - 2⁵ = 203115323471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203115323533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101557661751 + 101557661752.

It is an arithmetic number, because the mean of its divisors is an integer number (101557661752).

Almost surely, 2^203115323503 is an apocalyptic number.

203115323503 is a deficient number, since it is larger than the sum of its proper divisors (1).

203115323503 is an equidigital number, since it uses as much as digits as its factorization.

203115323503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 28.

Adding to 203115323503 its reverse (305323511302), we get a palindrome (508438834805).

The spelling of 203115323503 in words is "two hundred three billion, one hundred fifteen million, three hundred twenty-three thousand, five hundred three".