216571016 has 16 divisors (see below), whose sum is σ = 411791040. Its totient is φ = 106760080.

The previous prime is 216570997. The next prime is 216571021. The reversal of 216571016 is 610175612.

It is a self number, because there is not a number n which added to its sum of digits gives 216571016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190076 + ... + 191211.

It is an arithmetic number, because the mean of its divisors is an integer number (25736940).

Almost surely, 2^216571016 is an apocalyptic number.

It is an amenable number.

216571016 is a deficient number, since it is larger than the sum of its proper divisors (195220024).

216571016 is a wasteful number, since it uses less digits than its factorization.

216571016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381364 (or 381360 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 216571016 is about 14716.3519936158. The cubic root of 216571016 is about 600.5282532961.

The spelling of 216571016 in words is "two hundred sixteen million, five hundred seventy-one thousand, sixteen".