216487603 has 2 divisors, whose sum is σ = 216487604. Its totient is φ = 216487602.

The previous prime is 216487561. The next prime is 216487637. The reversal of 216487603 is 306784612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216487603 is a prime.

It is not a weakly prime, because it can be changed into another prime (216487003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108243801 + 108243802.

It is an arithmetic number, because the mean of its divisors is an integer number (108243802).

Almost surely, 2^216487603 is an apocalyptic number.

216487603 is a deficient number, since it is larger than the sum of its proper divisors (1).

216487603 is an equidigital number, since it uses as much as digits as its factorization.

216487603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 216487603 is about 14713.5176963227. The cubic root of 216487603 is about 600.4511449546.

The spelling of 216487603 in words is "two hundred sixteen million, four hundred eighty-seven thousand, six hundred three".