216939595 has 8 divisors (see below), whose sum is σ = 260406864. Its totient is φ = 173498784.

The previous prime is 216939571. The next prime is 216939599. The reversal of 216939595 is 595939612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216939595 - 2⁵ = 216939563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216939599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26592 + ... + 33778.

It is an arithmetic number, because the mean of its divisors is an integer number (32550858).

Almost surely, 2^216939595 is an apocalyptic number.

216939595 is a deficient number, since it is larger than the sum of its proper divisors (43467269).

216939595 is an equidigital number, since it uses as much as digits as its factorization.

216939595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13229.

The product of its digits is 656100, while the sum is 49.

The square root of 216939595 is about 14728.8694406597. The cubic root of 216939595 is about 600.8687369236.

The spelling of 216939595 in words is "two hundred sixteen million, nine hundred thirty-nine thousand, five hundred ninety-five".