203391216 has 160 divisors (see below), whose sum is σ = 674718720. Its totient is φ = 57459456.

The previous prime is 203391211. The next prime is 203391229. The reversal of 203391216 is 612193302.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 203391216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203391211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311146 + ... + 311798.

It is an arithmetic number, because the mean of its divisors is an integer number (4216992).

Almost surely, 2^203391216 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 203391216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (337359360).

203391216 is an abundant number, since it is smaller than the sum of its proper divisors (471327504).

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

203391216 is a wasteful number, since it uses less digits than its factorization.

203391216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 203391216 is about 14261.5292307662. The cubic root of 203391216 is about 588.0903651205.

The spelling of 203391216 in words is "two hundred three million, three hundred ninety-one thousand, two hundred sixteen".