216285673 has 2 divisors, whose sum is σ = 216285674. Its totient is φ = 216285672.

The previous prime is 216285649. The next prime is 216285689. The reversal of 216285673 is 376582612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190357209 + 25928464 = 13797^2 + 5092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216285673 is a prime.

It is not a weakly prime, because it can be changed into another prime (216285623) 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, 108142836 + 108142837.

It is an arithmetic number, because the mean of its divisors is an integer number (108142837).

Almost surely, 2^216285673 is an apocalyptic number.

It is an amenable number.

216285673 is a deficient number, since it is larger than the sum of its proper divisors (1).

216285673 is an equidigital number, since it uses as much as digits as its factorization.

216285673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 216285673 is about 14706.6540382237. The cubic root of 216285673 is about 600.2643955116.

The spelling of 216285673 in words is "two hundred sixteen million, two hundred eighty-five thousand, six hundred seventy-three".