216167671 has 2 divisors, whose sum is σ = 216167672. Its totient is φ = 216167670.

The previous prime is 216167663. The next prime is 216167683. The reversal of 216167671 is 176761612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216167671 - 2³ = 216167663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216167671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216164671) 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 as a sum of consecutive naturals, namely, 108083835 + 108083836.

It is an arithmetic number, because the mean of its divisors is an integer number (108083836).

Almost surely, 2^216167671 is an apocalyptic number.

216167671 is a deficient number, since it is larger than the sum of its proper divisors (1).

216167671 is an equidigital number, since it uses as much as digits as its factorization.

216167671 is an odious number, because the sum of its binary digits is odd.

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

The square root of 216167671 is about 14702.6416333936. The cubic root of 216167671 is about 600.1552107718.

The spelling of 216167671 in words is "two hundred sixteen million, one hundred sixty-seven thousand, six hundred seventy-one".