216146173 has 2 divisors, whose sum is σ = 216146174. Its totient is φ = 216146172.

The previous prime is 216146171. The next prime is 216146191. The reversal of 216146173 is 371641612.

216146173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179640409 + 36505764 = 13403^2 + 6042^2 .

It is a cyclic number.

It is not a de Polignac number, because 216146173 - 2¹ = 216146171 is a prime.

Together with 216146171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216146171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108073086 + 108073087.

It is an arithmetic number, because the mean of its divisors is an integer number (108073087).

Almost surely, 2^216146173 is an apocalyptic number.

It is an amenable number.

216146173 is a deficient number, since it is larger than the sum of its proper divisors (1).

216146173 is an equidigital number, since it uses as much as digits as its factorization.

216146173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 216146173 is about 14701.9105221056. The cubic root of 216146173 is about 600.1353148512.

Adding to 216146173 its reverse (371641612), we get a palindrome (587787785).

The spelling of 216146173 in words is "two hundred sixteen million, one hundred forty-six thousand, one hundred seventy-three".