216275161 has 2 divisors, whose sum is σ = 216275162. Its totient is φ = 216275160.

The previous prime is 216275117. The next prime is 216275183. The reversal of 216275161 is 161572612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213715161 + 2560000 = 14619^2 + 1600^2 .

It is a cyclic number.

It is not a de Polignac number, because 216275161 - 2¹³ = 216266969 is a prime.

It is not a weakly prime, because it can be changed into another prime (216275261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108137580 + 108137581.

It is an arithmetic number, because the mean of its divisors is an integer number (108137581).

Almost surely, 2^216275161 is an apocalyptic number.

It is an amenable number.

216275161 is a deficient number, since it is larger than the sum of its proper divisors (1).

216275161 is an equidigital number, since it uses as much as digits as its factorization.

216275161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 216275161 is about 14706.2966446349. The cubic root of 216275161 is about 600.2546705932.

The spelling of 216275161 in words is "two hundred sixteen million, two hundred seventy-five thousand, one hundred sixty-one".