203231113 has 2 divisors, whose sum is σ = 203231114. Its totient is φ = 203231112.

The previous prime is 203231069. The next prime is 203231117. The reversal of 203231113 is 311132302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199741689 + 3489424 = 14133^2 + 1868^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203231113 is a prime.

It is not a weakly prime, because it can be changed into another prime (203231117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101615556 + 101615557.

It is an arithmetic number, because the mean of its divisors is an integer number (101615557).

Almost surely, 2^203231113 is an apocalyptic number.

It is an amenable number.

203231113 is a deficient number, since it is larger than the sum of its proper divisors (1).

203231113 is an equidigital number, since it uses as much as digits as its factorization.

203231113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 203231113 is about 14255.9150179846. The cubic root of 203231113 is about 587.9360160297.

Adding to 203231113 its reverse (311132302), we get a palindrome (514363415).

The spelling of 203231113 in words is "two hundred three million, two hundred thirty-one thousand, one hundred thirteen".