201297217 has 4 divisors (see below), whose sum is σ = 219596976. Its totient is φ = 182997460.

The previous prime is 201297209. The next prime is 201297223. The reversal of 201297217 is 712792102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 201297217 - 2³ = 201297209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201297227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9149863 + ... + 9149884.

It is an arithmetic number, because the mean of its divisors is an integer number (54899244).

Almost surely, 2^201297217 is an apocalyptic number.

It is an amenable number.

201297217 is a deficient number, since it is larger than the sum of its proper divisors (18299759).

201297217 is a wasteful number, since it uses less digits than its factorization.

201297217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18299758.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 201297217 is about 14187.9250420913. The cubic root of 201297217 is about 586.0651857036.

The spelling of 201297217 in words is "two hundred one million, two hundred ninety-seven thousand, two hundred seventeen".