216666230 has 48 divisors (see below), whose sum is σ = 431034912. Its totient is φ = 78355200.

The previous prime is 216666211. The next prime is 216666257. The reversal of 216666230 is 32666612.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291239 + ... + 291981.

It is an arithmetic number, because the mean of its divisors is an integer number (8979894).

Almost surely, 2^216666230 is an apocalyptic number.

216666230 is a deficient number, since it is larger than the sum of its proper divisors (214368682).

216666230 is a wasteful number, since it uses less digits than its factorization.

216666230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 216666230 is about 14719.5866110431. The cubic root of 216666230 is about 600.6162464801.

The spelling of 216666230 in words is "two hundred sixteen million, six hundred sixty-six thousand, two hundred thirty".