216717001 has 4 divisors (see below), whose sum is σ = 223707904. Its totient is φ = 209726100.

The previous prime is 216716993. The next prime is 216717019. The reversal of 216717001 is 100717612.

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 216717001 - 2³ = 216716993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216717031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3495405 + ... + 3495466.

It is an arithmetic number, because the mean of its divisors is an integer number (55926976).

Almost surely, 2^216717001 is an apocalyptic number.

It is an amenable number.

216717001 is a deficient number, since it is larger than the sum of its proper divisors (6990903).

216717001 is an equidigital number, since it uses as much as digits as its factorization.

216717001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6990902.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 216717001 is about 14721.3111168809. The cubic root of 216717001 is about 600.6631565837.

The spelling of 216717001 in words is "two hundred sixteen million, seven hundred seventeen thousand, one".