216102149 has 2 divisors, whose sum is σ = 216102150. Its totient is φ = 216102148.

The previous prime is 216102121. The next prime is 216102151. The reversal of 216102149 is 941201612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167521249 + 48580900 = 12943^2 + 6970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216102149 is a prime.

Together with 216102151, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216102109) 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, 108051074 + 108051075.

It is an arithmetic number, because the mean of its divisors is an integer number (108051075).

Almost surely, 2^216102149 is an apocalyptic number.

It is an amenable number.

216102149 is a deficient number, since it is larger than the sum of its proper divisors (1).

216102149 is an equidigital number, since it uses as much as digits as its factorization.

216102149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 216102149 is about 14700.4132254845. The cubic root of 216102149 is about 600.0945675016.

The spelling of 216102149 in words is "two hundred sixteen million, one hundred two thousand, one hundred forty-nine".