216515352234 has 32 divisors (see below), whose sum is σ = 442281482496. Its totient is φ = 70630247360.

The previous prime is 216515352233. The next prime is 216515352239. The reversal of 216515352234 is 432253515612.

It is a junction number, because it is equal to n+sod(n) for n = 216515352192 and 216515352201.

It is not an unprimeable number, because it can be changed into a prime (216515352233) 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 in 15 ways as a sum of consecutive naturals, for example, 4369204 + ... + 4418480.

It is an arithmetic number, because the mean of its divisors is an integer number (13821296328).

Almost surely, 2^216515352234 is an apocalyptic number.

216515352234 is an abundant number, since it is smaller than the sum of its proper divisors (225766130262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216515352234 is a wasteful number, since it uses less digits than its factorization.

216515352234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64910.

The product of its digits is 216000, while the sum is 39.

Adding to 216515352234 its reverse (432253515612), we get a palindrome (648768867846).

The spelling of 216515352234 in words is "two hundred sixteen billion, five hundred fifteen million, three hundred fifty-two thousand, two hundred thirty-four".