203431312 has 40 divisors (see below), whose sum is σ = 451385792. Its totient is φ = 87004800.

The previous prime is 203431273. The next prime is 203431357. The reversal of 203431312 is 213134302.

It is a self number, because there is not a number n which added to its sum of digits gives 203431312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62362 + ... + 65542.

Almost surely, 2^203431312 is an apocalyptic number.

It is an amenable number.

203431312 is an abundant number, since it is smaller than the sum of its proper divisors (247954480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203431312 is a wasteful number, since it uses less digits than its factorization.

203431312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767 (or 3761 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 203431312 is about 14262.9349013448. The cubic root of 203431312 is about 588.1290074349.

Adding to 203431312 its reverse (213134302), we get a palindrome (416565614).

The spelling of 203431312 in words is "two hundred three million, four hundred thirty-one thousand, three hundred twelve".