216081885 has 8 divisors (see below), whose sum is σ = 345731040. Its totient is φ = 115243664.

The previous prime is 216081863. The next prime is 216081913. The reversal of 216081885 is 588180612.

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 216081885 - 2⁶ = 216081821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7202715 + ... + 7202744.

It is an arithmetic number, because the mean of its divisors is an integer number (43216380).

Almost surely, 2^216081885 is an apocalyptic number.

It is an amenable number.

216081885 is a deficient number, since it is larger than the sum of its proper divisors (129649155).

216081885 is a wasteful number, since it uses less digits than its factorization.

216081885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14405467.

The product of its (nonzero) digits is 30720, while the sum is 39.

The square root of 216081885 is about 14699.7239770004. The cubic root of 216081885 is about 600.0758098655.

The spelling of 216081885 in words is "two hundred sixteen million, eighty-one thousand, eight hundred eighty-five".