216361049 has 2 divisors, whose sum is σ = 216361050. Its totient is φ = 216361048.

The previous prime is 216361039. The next prime is 216361051. The reversal of 216361049 is 940163612.

216361049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193627225 + 22733824 = 13915^2 + 4768^2 .

It is a cyclic number.

It is not a de Polignac number, because 216361049 - 2²⁴ = 199583833 is a prime.

It is a Sophie Germain prime.

Together with 216361051, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (216361009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108180524 + 108180525.

It is an arithmetic number, because the mean of its divisors is an integer number (108180525).

Almost surely, 2^216361049 is an apocalyptic number.

It is an amenable number.

216361049 is a deficient number, since it is larger than the sum of its proper divisors (1).

216361049 is an equidigital number, since it uses as much as digits as its factorization.

216361049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 216361049 is about 14709.2164645164. The cubic root of 216361049 is about 600.3341185364.

The spelling of 216361049 in words is "two hundred sixteen million, three hundred sixty-one thousand, forty-nine".