216679164 has 24 divisors (see below), whose sum is σ = 544476240. Its totient is φ = 66670464.

The previous prime is 216679163. The next prime is 216679187. The reversal of 216679164 is 461976612.

It is a super-2 number, since 2×216679164² = 93899720223477792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216679163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694329 + ... + 694640.

It is an arithmetic number, because the mean of its divisors is an integer number (22686510).

Almost surely, 2^216679164 is an apocalyptic number.

It is an amenable number.

216679164 is an abundant number, since it is smaller than the sum of its proper divisors (327797076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216679164 is a wasteful number, since it uses less digits than its factorization.

216679164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1388989 (or 1388987 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 216679164 is about 14720.0259510641. The cubic root of 216679164 is about 600.6281976056.

The spelling of 216679164 in words is "two hundred sixteen million, six hundred seventy-nine thousand, one hundred sixty-four".