216714681 has 12 divisors (see below), whose sum is σ = 313312740. Its totient is φ = 144347040.

The previous prime is 216714679. The next prime is 216714713. The reversal of 216714681 is 186417612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 203319081 + 13395600 = 14259^2 + 3660^2 .

It is not a de Polignac number, because 216714681 - 2¹ = 216714679 is a prime.

It is a super-2 number, since 2×216714681² = 93930505921863522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (216713681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 435 + ... + 20823.

It is an arithmetic number, because the mean of its divisors is an integer number (26109395).

Almost surely, 2^216714681 is an apocalyptic number.

It is an amenable number.

216714681 is a deficient number, since it is larger than the sum of its proper divisors (96598059).

216714681 is a wasteful number, since it uses less digits than its factorization.

216714681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21576 (or 21573 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 216714681 is about 14721.2323193407. The cubic root of 216714681 is about 600.6610131686.

The spelling of 216714681 in words is "two hundred sixteen million, seven hundred fourteen thousand, six hundred eighty-one".