216167805 has 128 divisors (see below), whose sum is σ = 465960960. Its totient is φ = 93000960.

The previous prime is 216167797. The next prime is 216167813. The reversal of 216167805 is 508761612.

It is an interprime number because it is at equal distance from previous prime (216167797) and next prime (216167813).

It is not a de Polignac number, because 216167805 - 2³ = 216167797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216167805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1376787 + ... + 1376943.

It is an arithmetic number, because the mean of its divisors is an integer number (3640320).

Almost surely, 2^216167805 is an apocalyptic number.

It is an amenable number.

216167805 is an abundant number, since it is smaller than the sum of its proper divisors (249793155).

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

216167805 is a wasteful number, since it uses less digits than its factorization.

216167805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 216167805 is about 14702.6461903972. The cubic root of 216167805 is about 600.1553347817.

The spelling of 216167805 in words is "two hundred sixteen million, one hundred sixty-seven thousand, eight hundred five".