203420331 has 12 divisors (see below), whose sum is σ = 294099208. Its totient is φ = 135489024.

The previous prime is 203420281. The next prime is 203420341. The reversal of 203420331 is 133024302.

It is not a de Polignac number, because 203420331 - 2²⁶ = 136311467 is a prime.

It is a super-2 number, since 2×203420331² = 82759662128299122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203420341) 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 11 ways as a sum of consecutive naturals, for example, 576 + ... + 20178.

Almost surely, 2^203420331 is an apocalyptic number.

203420331 is a deficient number, since it is larger than the sum of its proper divisors (90678877).

203420331 is a wasteful number, since it uses less digits than its factorization.

203420331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20762 (or 20759 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 203420331 is about 14262.5499473271. The cubic root of 203420331 is about 588.1184250574.

Adding to 203420331 its reverse (133024302), we get a palindrome (336444633).

The spelling of 203420331 in words is "two hundred three million, four hundred twenty thousand, three hundred thirty-one".