216308383 has 2 divisors, whose sum is σ = 216308384. Its totient is φ = 216308382.

The previous prime is 216308377. The next prime is 216308431. The reversal of 216308383 is 383803612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216308383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216308683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108154191 + 108154192.

It is an arithmetic number, because the mean of its divisors is an integer number (108154192).

Almost surely, 2^216308383 is an apocalyptic number.

216308383 is a deficient number, since it is larger than the sum of its proper divisors (1).

216308383 is an equidigital number, since it uses as much as digits as its factorization.

216308383 is an evil number, because the sum of its binary digits is even.

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

The square root of 216308383 is about 14707.4261174415. The cubic root of 216308383 is about 600.2854040342.

The spelling of 216308383 in words is "two hundred sixteen million, three hundred eight thousand, three hundred eighty-three".