203105196 has 108 divisors (see below), whose sum is σ = 603891288. Its totient is φ = 57383424.

The previous prime is 203105167. The next prime is 203105197. The reversal of 203105196 is 691501302.

It is not an unprimeable number, because it can be changed into a prime (203105197) 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 in 35 ways as a sum of consecutive naturals, for example, 170515 + ... + 171701.

It is an arithmetic number, because the mean of its divisors is an integer number (5591586).

Almost surely, 2^203105196 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 203105196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301945644).

203105196 is an abundant number, since it is smaller than the sum of its proper divisors (400786092).

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

203105196 is a wasteful number, since it uses less digits than its factorization.

203105196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308 (or 1296 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 203105196 is about 14251.4980265234. The cubic root of 203105196 is about 587.8145673782.

Adding to 203105196 its reverse (691501302), we get a palindrome (894606498).

The spelling of 203105196 in words is "two hundred three million, one hundred five thousand, one hundred ninety-six".