216500135 has 8 divisors (see below), whose sum is σ = 266822016. Its totient is φ = 168518880.

The previous prime is 216500111. The next prime is 216500161. The reversal of 216500135 is 531005612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216500135 - 2²⁶ = 149391271 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216500135.

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 in 7 ways as a sum of consecutive naturals, for example, 584951 + ... + 585320.

It is an arithmetic number, because the mean of its divisors is an integer number (33352752).

Almost surely, 2^216500135 is an apocalyptic number.

216500135 is a deficient number, since it is larger than the sum of its proper divisors (50321881).

216500135 is a wasteful number, since it uses less digits than its factorization.

216500135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170313.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 216500135 is about 14713.9435570482. The cubic root of 216500135 is about 600.4627310046.

Adding to 216500135 its reverse (531005612), we get a palindrome (747505747).

The spelling of 216500135 in words is "two hundred sixteen million, five hundred thousand, one hundred thirty-five".