801715217 has 4 divisors (see below), whose sum is σ = 801785856. Its totient is φ = 801644580.

The previous prime is 801715183. The next prime is 801715219. The reversal of 801715217 is 712517108.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 801715217 - 2⁸ = 801714961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (801715219) 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, 14009 + ... + 42422.

It is an arithmetic number, because the mean of its divisors is an integer number (200446464).

Almost surely, 2^801715217 is an apocalyptic number.

It is an amenable number.

801715217 is a deficient number, since it is larger than the sum of its proper divisors (70639).

801715217 is a wasteful number, since it uses less digits than its factorization.

801715217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70638.

The product of its (nonzero) digits is 3920, while the sum is 32.

The square root of 801715217 is about 28314.5760519207. The cubic root of 801715217 is about 928.9807374798.

The spelling of 801715217 in words is "eight hundred one million, seven hundred fifteen thousand, two hundred seventeen".