203321431402 has 16 divisors (see below), whose sum is σ = 305933632200. Its totient is φ = 101343702528.

The previous prime is 203321431393. The next prime is 203321431403. The reversal of 203321431402 is 204134123302.

It can be written as a sum of positive squares in 4 ways, for example, as 203257607281 + 63824121 = 450841^2 + 7989^2 .

It is not an unprimeable number, because it can be changed into a prime (203321431403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2880678 + ... + 2950414.

Almost surely, 2^203321431402 is an apocalyptic number.

203321431402 is a deficient number, since it is larger than the sum of its proper divisors (102612200798).

203321431402 is a wasteful number, since it uses less digits than its factorization.

203321431402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74265.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 203321431402 its reverse (204134123302), we get a palindrome (407455554704).

The spelling of 203321431402 in words is "two hundred three billion, three hundred twenty-one million, four hundred thirty-one thousand, four hundred two".