216986141 has 2 divisors, whose sum is σ = 216986142. Its totient is φ = 216986140.

The previous prime is 216986101. The next prime is 216986179. The reversal of 216986141 is 141689612.

It is an a-pointer prime, because the next prime (216986179) can be obtained adding 216986141 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190164100 + 26822041 = 13790^2 + 5179^2 .

It is a cyclic number.

It is not a de Polignac number, because 216986141 - 2¹⁰ = 216985117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216986095 and 216986104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216986101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108493070 + 108493071.

It is an arithmetic number, because the mean of its divisors is an integer number (108493071).

Almost surely, 2^216986141 is an apocalyptic number.

It is an amenable number.

216986141 is a deficient number, since it is larger than the sum of its proper divisors (1).

216986141 is an equidigital number, since it uses as much as digits as its factorization.

216986141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 216986141 is about 14730.4494500338. The cubic root of 216986141 is about 600.9117074660.

The spelling of 216986141 in words is "two hundred sixteen million, nine hundred eighty-six thousand, one hundred forty-one".