216705695 has 4 divisors (see below), whose sum is σ = 260046840. Its totient is φ = 173364552.

The previous prime is 216705679. The next prime is 216705721. The reversal of 216705695 is 596507612.

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

It is a cyclic number.

It is not a de Polignac number, because 216705695 - 2⁴ = 216705679 is a prime.

It is a super-2 number, since 2×216705695² = 93922716490866050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 21670565 + ... + 21670574.

It is an arithmetic number, because the mean of its divisors is an integer number (65011710).

Almost surely, 2^216705695 is an apocalyptic number.

216705695 is a deficient number, since it is larger than the sum of its proper divisors (43341145).

216705695 is an equidigital number, since it uses as much as digits as its factorization.

216705695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43341144.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 216705695 is about 14720.9271107495. The cubic root of 216705695 is about 600.6527109861.

The spelling of 216705695 in words is "two hundred sixteen million, seven hundred five thousand, six hundred ninety-five".