216855734 has 4 divisors (see below), whose sum is σ = 325283604. Its totient is φ = 108427866.

The previous prime is 216855733. The next prime is 216855761. The reversal of 216855734 is 437558612.

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

It is a junction number, because it is equal to n+sod(n) for n = 216855691 and 216855700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216855731) 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 as a sum of consecutive naturals, namely, 54213932 + ... + 54213935.

It is an arithmetic number, because the mean of its divisors is an integer number (81320901).

Almost surely, 2^216855734 is an apocalyptic number.

216855734 is a deficient number, since it is larger than the sum of its proper divisors (108427870).

216855734 is a wasteful number, since it uses less digits than its factorization.

216855734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108427869.

The product of its digits is 201600, while the sum is 41.

The square root of 216855734 is about 14726.0223414200. The cubic root of 216855734 is about 600.7913022388.

The spelling of 216855734 in words is "two hundred sixteen million, eight hundred fifty-five thousand, seven hundred thirty-four".