216701 has 4 divisors (see below), whose sum is σ = 218400. Its totient is φ = 215004.

The previous prime is 216679. The next prime is 216703. The reversal of 216701 is 107612.

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 a de Polignac number, because none of the positive numbers 2^k-216701 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216701.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216701.

It is not an unprimeable number, because it can be changed into a prime (216703) 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, 641 + ... + 918.

It is an arithmetic number, because the mean of its divisors is an integer number (54600).

2²¹⁶⁷⁰¹ is an apocalyptic number.

It is an amenable number.

216701 is a deficient number, since it is larger than the sum of its proper divisors (1699).

216701 is a wasteful number, since it uses less digits than its factorization.

216701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 216701 is about 465.5115465807. The cubic root of 216701 is about 60.0648373175.

The spelling of 216701 in words is "two hundred sixteen thousand, seven hundred one".