216782395 has 16 divisors (see below), whose sum is σ = 270918720. Its totient is φ = 166320000.

The previous prime is 216782389. The next prime is 216782407. The reversal of 216782395 is 593287612.

It is a de Polignac number, because none of the positive numbers 2^k-216782395 is a prime.

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, 16945 + ... + 26845.

It is an arithmetic number, because the mean of its divisors is an integer number (16932420).

Almost surely, 2^216782395 is an apocalyptic number.

216782395 is a deficient number, since it is larger than the sum of its proper divisors (54136325).

216782395 is a wasteful number, since it uses less digits than its factorization.

216782395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10086.

The product of its digits is 181440, while the sum is 43.

The square root of 216782395 is about 14723.5320151110. The cubic root of 216782395 is about 600.7235668823.

The spelling of 216782395 in words is "two hundred sixteen million, seven hundred eighty-two thousand, three hundred ninety-five".