203323134401 has 4 divisors (see below), whose sum is σ = 203868237012. Its totient is φ = 202778031792.

The previous prime is 203323134389. The next prime is 203323134437. The reversal of 203323134401 is 104431323302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104431323302 = 2 ⋅52215661651.

It can be written as a sum of positive squares in 2 ways, for example, as 59670764176 + 143652370225 = 244276^2 + 379015^2 .

It is a cyclic number.

It is not a de Polignac number, because 203323134401 - 2¹⁴ = 203323118017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (203323134451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272550746 + ... + 272551491.

It is an arithmetic number, because the mean of its divisors is an integer number (50967059253).

Almost surely, 2^203323134401 is an apocalyptic number.

It is an amenable number.

203323134401 is a deficient number, since it is larger than the sum of its proper divisors (545102611).

203323134401 is an equidigital number, since it uses as much as digits as its factorization.

203323134401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545102610.

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

Adding to 203323134401 its reverse (104431323302), we get a palindrome (307754457703).

The spelling of 203323134401 in words is "two hundred three billion, three hundred twenty-three million, one hundred thirty-four thousand, four hundred one".