216634934 has 4 divisors (see below), whose sum is σ = 324952404. Its totient is φ = 108317466.

The previous prime is 216634933. The next prime is 216634967. The reversal of 216634934 is 439436612.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216634931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54158732 + ... + 54158735.

It is an arithmetic number, because the mean of its divisors is an integer number (81238101).

Almost surely, 2^216634934 is an apocalyptic number.

216634934 is a deficient number, since it is larger than the sum of its proper divisors (108317470).

216634934 is a wasteful number, since it uses less digits than its factorization.

216634934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108317469.

The product of its digits is 93312, while the sum is 38.

The square root of 216634934 is about 14718.5234993188. The cubic root of 216634934 is about 600.5873267431.

The spelling of 216634934 in words is "two hundred sixteen million, six hundred thirty-four thousand, nine hundred thirty-four".