217372001 has 16 divisors (see below), whose sum is σ = 271347840. Its totient is φ = 169169280.

The previous prime is 217371997. The next prime is 217372019. The reversal of 217372001 is 100273712.

It is not a de Polignac number, because 217372001 - 2² = 217371997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (217372501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93485 + ... + 95781.

It is an arithmetic number, because the mean of its divisors is an integer number (16959240).

Almost surely, 2^217372001 is an apocalyptic number.

It is an amenable number.

217372001 is a deficient number, since it is larger than the sum of its proper divisors (53975839).

217372001 is a wasteful number, since it uses less digits than its factorization.

217372001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544.

The product of its (nonzero) digits is 588, while the sum is 23.

The square root of 217372001 is about 14743.5409925838. The cubic root of 217372001 is about 601.2676910091.

The spelling of 217372001 in words is "two hundred seventeen million, three hundred seventy-two thousand, one".