216180847 has 2 divisors, whose sum is σ = 216180848. Its totient is φ = 216180846.

The previous prime is 216180827. The next prime is 216180851. The reversal of 216180847 is 748081612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216180847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216180827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108090423 + 108090424.

It is an arithmetic number, because the mean of its divisors is an integer number (108090424).

Almost surely, 2^216180847 is an apocalyptic number.

216180847 is a deficient number, since it is larger than the sum of its proper divisors (1).

216180847 is an equidigital number, since it uses as much as digits as its factorization.

216180847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 216180847 is about 14703.0897093094. The cubic root of 216180847 is about 600.1674042146.

The spelling of 216180847 in words is "two hundred sixteen million, one hundred eighty thousand, eight hundred forty-seven".