203313216 has 56 divisors (see below), whose sum is σ = 542751264. Its totient is φ = 67164160.

The previous prime is 203313203. The next prime is 203313239. The reversal of 203313216 is 612313302.

It is a junction number, because it is equal to n+sod(n) for n = 203313192 and 203313201.

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, 17011 + ... + 26381.

Almost surely, 2^203313216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203313216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271375632).

203313216 is an abundant number, since it is smaller than the sum of its proper divisors (339438048).

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

203313216 is a wasteful number, since it uses less digits than its factorization.

203313216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9499 (or 9489 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 203313216 is about 14258.7943389334. The cubic root of 203313216 is about 588.0151784688.

Adding to 203313216 its reverse (612313302), we get a palindrome (815626518).

The spelling of 203313216 in words is "two hundred three million, three hundred thirteen thousand, two hundred sixteen".