216489503 has 2 divisors, whose sum is σ = 216489504. Its totient is φ = 216489502.

The previous prime is 216489487. The next prime is 216489521. The reversal of 216489503 is 305984612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216489503 - 2⁴ = 216489487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216483503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108244751 + 108244752.

It is an arithmetic number, because the mean of its divisors is an integer number (108244752).

Almost surely, 2^216489503 is an apocalyptic number.

216489503 is a deficient number, since it is larger than the sum of its proper divisors (1).

216489503 is an equidigital number, since it uses as much as digits as its factorization.

216489503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 216489503 is about 14713.5822626579. The cubic root of 216489503 is about 600.4529015661.

The spelling of 216489503 in words is "two hundred sixteen million, four hundred eighty-nine thousand, five hundred three".