216985270 has 16 divisors (see below), whose sum is σ = 391162608. Its totient is φ = 86663200.

The previous prime is 216985261. The next prime is 216985283. The reversal of 216985270 is 72589612.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9256 + ... + 22795.

It is an arithmetic number, because the mean of its divisors is an integer number (24447663).

Almost surely, 2^216985270 is an apocalyptic number.

216985270 is a deficient number, since it is larger than the sum of its proper divisors (174177338).

216985270 is a wasteful number, since it uses less digits than its factorization.

216985270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32735.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 216985270 is about 14730.4198853936. The cubic root of 216985270 is about 600.9109034288.

The spelling of 216985270 in words is "two hundred sixteen million, nine hundred eighty-five thousand, two hundred seventy".