216171834 has 32 divisors (see below), whose sum is σ = 450144960. Its totient is φ = 69144192.

The previous prime is 216171817. The next prime is 216171841. The reversal of 216171834 is 438171612.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216171795 and 216171804.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9537 + ... + 22875.

It is an arithmetic number, because the mean of its divisors is an integer number (14067030).

Almost surely, 2^216171834 is an apocalyptic number.

216171834 is an abundant number, since it is smaller than the sum of its proper divisors (233973126).

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

216171834 is a wasteful number, since it uses less digits than its factorization.

216171834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13454.

The product of its digits is 8064, while the sum is 33.

The square root of 216171834 is about 14702.7832059104. The cubic root of 216171834 is about 600.1590633832.

The spelling of 216171834 in words is "two hundred sixteen million, one hundred seventy-one thousand, eight hundred thirty-four".