216503047 has 2 divisors, whose sum is σ = 216503048. Its totient is φ = 216503046.

The previous prime is 216503033. The next prime is 216503057. The reversal of 216503047 is 740305612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216503047 - 2¹⁵ = 216470279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216503017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108251523 + 108251524.

It is an arithmetic number, because the mean of its divisors is an integer number (108251524).

Almost surely, 2^216503047 is an apocalyptic number.

216503047 is a deficient number, since it is larger than the sum of its proper divisors (1).

216503047 is an equidigital number, since it uses as much as digits as its factorization.

216503047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 216503047 is about 14714.0425104728. The cubic root of 216503047 is about 600.4654231348.

Adding to 216503047 its reverse (740305612), we get a palindrome (956808659).

The spelling of 216503047 in words is "two hundred sixteen million, five hundred three thousand, forty-seven".