216500126 has 4 divisors (see below), whose sum is σ = 324750192. Its totient is φ = 108250062.

The previous prime is 216500111. The next prime is 216500161. The reversal of 216500126 is 621005612.

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

It is a congruent number.

It is an unprimeable number.

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, 54125030 + ... + 54125033.

It is an arithmetic number, because the mean of its divisors is an integer number (81187548).

Almost surely, 2^216500126 is an apocalyptic number.

216500126 is a deficient number, since it is larger than the sum of its proper divisors (108250066).

216500126 is a wasteful number, since it uses less digits than its factorization.

216500126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108250065.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 216500126 is about 14713.9432512158. The cubic root of 216500126 is about 600.4627226841.

Adding to 216500126 its reverse (621005612), we get a palindrome (837505738).

The spelling of 216500126 in words is "two hundred sixteen million, five hundred thousand, one hundred twenty-six".