201665226 has 16 divisors (see below), whose sum is σ = 460949184. Its totient is φ = 57618624.

The previous prime is 201665179. The next prime is 201665251. The reversal of 201665226 is 622566102.

It is a junction number, because it is equal to n+sod(n) for n = 201665193 and 201665202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2400735 + ... + 2400818.

It is an arithmetic number, because the mean of its divisors is an integer number (28809324).

Almost surely, 2^201665226 is an apocalyptic number.

201665226 is an abundant number, since it is smaller than the sum of its proper divisors (259283958).

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

201665226 is a wasteful number, since it uses less digits than its factorization.

201665226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801565.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 201665226 is about 14200.8882116577. Note that the first 3 decimals coincide. The cubic root of 201665226 is about 586.4221139094.

The spelling of 201665226 in words is "two hundred one million, six hundred sixty-five thousand, two hundred twenty-six".