216071618 has 16 divisors (see below), whose sum is σ = 372003840. Its totient is φ = 92203296.

The previous prime is 216071587. The next prime is 216071621. The reversal of 216071618 is 816170612.

It is a happy 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, 29858 + ... + 36381.

It is an arithmetic number, because the mean of its divisors is an integer number (23250240).

Almost surely, 2^216071618 is an apocalyptic number.

216071618 is a deficient number, since it is larger than the sum of its proper divisors (155932222).

216071618 is a wasteful number, since it uses less digits than its factorization.

216071618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66481.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 216071618 is about 14699.3747486075. The cubic root of 216071618 is about 600.0663056353.

The spelling of 216071618 in words is "two hundred sixteen million, seventy-one thousand, six hundred eighteen".