216146771 has 2 divisors, whose sum is σ = 216146772.
Its totient is φ = 216146770.
The previous prime is 216146743. The next prime is 216146837. The reversal of 216146771 is 177641612.
It is a happy number.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 216146771 - 210 = 216145747 is a prime.
It is a super-2 number, since 2×2161467712 = 93438853227452882, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (216146171) 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, 108073385 + 108073386.
It is an arithmetic number, because the mean of its divisors is an integer number (108073386).
Almost surely, 2216146771 is an apocalyptic number.
216146771 is a deficient number, since it is larger than the sum of its proper divisors (1).
216146771 is an equidigital number, since it uses as much as digits as its factorization.
216146771 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 14112, while the sum is 35.
The square root of 216146771 is about 14701.9308595844.
The cubic root of 216146771 is about 600.1358683048.
The spelling of 216146771 in words is "two hundred sixteen million, one hundred forty-six thousand, seven hundred seventy-one".