216164473 has 8 divisors (see below), whose sum is σ = 247146048. Its totient is φ = 185208144.

The previous prime is 216164467. The next prime is 216164489. The reversal of 216164473 is 374461612.

216164473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216164473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216164873) 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, 18615 + ... + 27907.

It is an arithmetic number, because the mean of its divisors is an integer number (30893256).

Almost surely, 2^216164473 is an apocalyptic number.

It is an amenable number.

216164473 is a deficient number, since it is larger than the sum of its proper divisors (30981575).

216164473 is an equidigital number, since it uses as much as digits as its factorization.

216164473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12623.

The product of its digits is 24192, while the sum is 34.

The square root of 216164473 is about 14702.5328770250. The cubic root of 216164473 is about 600.1522511775.

The spelling of 216164473 in words is "two hundred sixteen million, one hundred sixty-four thousand, four hundred seventy-three".