196991225 has 12 divisors (see below), whose sum is σ = 245111916. Its totient is φ = 157049280.

The previous prime is 196991191. The next prime is 196991227. The reversal of 196991225 is 522199691.

It can be written as a sum of positive squares in 6 ways, for example, as 32228329 + 164762896 = 5677^2 + 12836^2 .

It is a de Polignac number, because none of the positive numbers 2^k-196991225 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196991227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6122 + ... + 20771.

It is an arithmetic number, because the mean of its divisors is an integer number (20425993).

Almost surely, 2^196991225 is an apocalyptic number.

It is an amenable number.

196991225 is a deficient number, since it is larger than the sum of its proper divisors (48120691).

196991225 is a wasteful number, since it uses less digits than its factorization.

196991225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27196 (or 27191 counting only the distinct ones).

The product of its digits is 87480, while the sum is 44.

The square root of 196991225 is about 14035.3562477053. The cubic root of 196991225 is about 581.8561472585.

The spelling of 196991225 in words is "one hundred ninety-six million, nine hundred ninety-one thousand, two hundred twenty-five".