216881346 has 32 divisors (see below), whose sum is σ = 485990208. Its totient is φ = 63944640.

The previous prime is 216881339. The next prime is 216881369. The reversal of 216881346 is 643188612.

216881346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41965 + ... + 46848.

It is an arithmetic number, because the mean of its divisors is an integer number (15187194).

Almost surely, 2^216881346 is an apocalyptic number.

216881346 is an abundant number, since it is smaller than the sum of its proper divisors (269108862).

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

216881346 is a wasteful number, since it uses less digits than its factorization.

216881346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88866.

The product of its digits is 55296, while the sum is 39.

The square root of 216881346 is about 14726.8919327874. The cubic root of 216881346 is about 600.8149536941.

The spelling of 216881346 in words is "two hundred sixteen million, eight hundred eighty-one thousand, three hundred forty-six".