216194512 has 10 divisors (see below), whose sum is σ = 418876898. Its totient is φ = 108097248.

The previous prime is 216194479. The next prime is 216194543. The reversal of 216194512 is 215491612.

It can be written as a sum of positive squares in only one way, i.e., 190550416 + 25644096 = 13804^2 + 5064^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6756063 + ... + 6756094.

Almost surely, 2^216194512 is an apocalyptic number.

It is an amenable number.

216194512 is a deficient number, since it is larger than the sum of its proper divisors (202682386).

216194512 is a wasteful number, since it uses less digits than its factorization.

216194512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13512165 (or 13512159 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 216194512 is about 14703.5544002122. The cubic root of 216194512 is about 600.1800496685.

The spelling of 216194512 in words is "two hundred sixteen million, one hundred ninety-four thousand, five hundred twelve".