216546513022249 has 2 divisors, whose sum is σ = 216546513022250. Its totient is φ = 216546513022248.

The previous prime is 216546513022223. The next prime is 216546513022297. The reversal of 216546513022249 is 942220315645612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118414507076649 + 98132005945600 = 10881843^2 + 9906160^2 .

It is a cyclic number.

It is not a de Polignac number, because 216546513022249 - 2⁹ = 216546513021737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216546513022196 and 216546513022205.

It is not a weakly prime, because it can be changed into another prime (216546513022219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108273256511124 + 108273256511125.

It is an arithmetic number, because the mean of its divisors is an integer number (108273256511125).

Almost surely, 2^{216546513022249} is an apocalyptic number.

It is an amenable number.

216546513022249 is a deficient number, since it is larger than the sum of its proper divisors (1).

216546513022249 is an equidigital number, since it uses as much as digits as its factorization.

216546513022249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 216546513022249 in words is "two hundred sixteen trillion, five hundred forty-six billion, five hundred thirteen million, twenty-two thousand, two hundred forty-nine".