216534103 has 4 divisors (see below), whose sum is σ = 218450448. Its totient is φ = 214617760.

The previous prime is 216534091. The next prime is 216534137. The reversal of 216534103 is 301435612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216534103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216534173) 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 in 3 ways as a sum of consecutive naturals, for example, 958003 + ... + 958228.

It is an arithmetic number, because the mean of its divisors is an integer number (54612612).

Almost surely, 2^216534103 is an apocalyptic number.

216534103 is a deficient number, since it is larger than the sum of its proper divisors (1916345).

216534103 is a wasteful number, since it uses less digits than its factorization.

216534103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1916344.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 216534103 is about 14715.0977910444. The cubic root of 216534103 is about 600.4941327578.

Adding to 216534103 its reverse (301435612), we get a palindrome (517969715).

The spelling of 216534103 in words is "two hundred sixteen million, five hundred thirty-four thousand, one hundred three".