216051566 has 8 divisors (see below), whose sum is σ = 335252520. Its totient is φ = 104300728.

The previous prime is 216051559. The next prime is 216051571. The reversal of 216051566 is 665150612.

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

It is a congruent number.

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, 1862456 + ... + 1862571.

It is an arithmetic number, because the mean of its divisors is an integer number (41906565).

Almost surely, 2^216051566 is an apocalyptic number.

216051566 is a deficient number, since it is larger than the sum of its proper divisors (119200954).

216051566 is a wasteful number, since it uses less digits than its factorization.

216051566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3725058.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 216051566 is about 14698.6926629548. The cubic root of 216051566 is about 600.0477424973.

The spelling of 216051566 in words is "two hundred sixteen million, fifty-one thousand, five hundred sixty-six".