216303371 has 2 divisors, whose sum is σ = 216303372. Its totient is φ = 216303370.

The previous prime is 216303361. The next prime is 216303379. The reversal of 216303371 is 173303612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216303371 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216303371.

It is not a weakly prime, because it can be changed into another prime (216303379) 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, 108151685 + 108151686.

It is an arithmetic number, because the mean of its divisors is an integer number (108151686).

Almost surely, 2^216303371 is an apocalyptic number.

216303371 is a deficient number, since it is larger than the sum of its proper divisors (1).

216303371 is an equidigital number, since it uses as much as digits as its factorization.

216303371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 216303371 is about 14707.2557263413. The cubic root of 216303371 is about 600.2807676694.

Adding to 216303371 its reverse (173303612), we get a palindrome (389606983).

The spelling of 216303371 in words is "two hundred sixteen million, three hundred three thousand, three hundred seventy-one".