216716671 has 8 divisors (see below), whose sum is σ = 224133120. Its totient is φ = 209417208.

The previous prime is 216716657. The next prime is 216716683. The reversal of 216716671 is 176617612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216716671 - 2⁵ = 216716639 is a prime.

It is a super-2 number, since 2×216716671² = 93932230978644482, which contains 22 as substring.

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 216716671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216716651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25471 + ... + 32896.

It is an arithmetic number, because the mean of its divisors is an integer number (28016640).

Almost surely, 2^216716671 is an apocalyptic number.

216716671 is a deficient number, since it is larger than the sum of its proper divisors (7416449).

216716671 is an equidigital number, since it uses as much as digits as its factorization.

216716671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58493.

The product of its digits is 21168, while the sum is 37.

The square root of 216716671 is about 14721.2999086358. The cubic root of 216716671 is about 600.6628517023.

The spelling of 216716671 in words is "two hundred sixteen million, seven hundred sixteen thousand, six hundred seventy-one".