216384613 has 2 divisors, whose sum is σ = 216384614. Its totient is φ = 216384612.

The previous prime is 216384599. The next prime is 216384617. The reversal of 216384613 is 316483612.

It is a happy number.

216384613 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., 126855169 + 89529444 = 11263^2 + 9462^2 .

It is a cyclic number.

It is not a de Polignac number, because 216384613 - 2¹³ = 216376421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216384617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108192306 + 108192307.

It is an arithmetic number, because the mean of its divisors is an integer number (108192307).

Almost surely, 2^216384613 is an apocalyptic number.

It is an amenable number.

216384613 is a deficient number, since it is larger than the sum of its proper divisors (1).

216384613 is an equidigital number, since it uses as much as digits as its factorization.

216384613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 216384613 is about 14710.0174371073. The cubic root of 216384613 is about 600.3559119842.

The spelling of 216384613 in words is "two hundred sixteen million, three hundred eighty-four thousand, six hundred thirteen".