216347834 has 4 divisors (see below), whose sum is σ = 324521754. Its totient is φ = 108173916.

The previous prime is 216347827. The next prime is 216347839. The reversal of 216347834 is 438743612.

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

It can be written as a sum of positive squares in only one way, i.e., 159390625 + 56957209 = 12625^2 + 7547^2 .

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (216347839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54086957 + ... + 54086960.

Almost surely, 2^216347834 is an apocalyptic number.

216347834 is a deficient number, since it is larger than the sum of its proper divisors (108173920).

216347834 is a wasteful number, since it uses less digits than its factorization.

216347834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108173919.

The product of its digits is 96768, while the sum is 38.

The square root of 216347834 is about 14708.7672495012. The cubic root of 216347834 is about 600.3218957928.

The spelling of 216347834 in words is "two hundred sixteen million, three hundred forty-seven thousand, eight hundred thirty-four".