201665227 has 8 divisors (see below), whose sum is σ = 206807040. Its totient is φ = 196544040.

The previous prime is 201665179. The next prime is 201665251. The reversal of 201665227 is 722566102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201665227 - 2⁷ = 201665099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201665287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15702 + ... + 25492.

It is an arithmetic number, because the mean of its divisors is an integer number (25850880).

Almost surely, 2^201665227 is an apocalyptic number.

201665227 is a deficient number, since it is larger than the sum of its proper divisors (5141813).

201665227 is an equidigital number, since it uses as much as digits as its factorization.

201665227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10313.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 201665227 is about 14200.8882468668. Note that the first 3 decimals coincide. The cubic root of 201665227 is about 586.4221148787.

The spelling of 201665227 in words is "two hundred one million, six hundred sixty-five thousand, two hundred twenty-seven".