194931216 has 30 divisors (see below), whose sum is σ = 545537070. Its totient is φ = 64977024.

The previous prime is 194931199. The next prime is 194931223. The reversal of 194931216 is 612139491.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 176783616 + 18147600 = 13296^2 + 4260^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 676701 + ... + 676988.

It is an arithmetic number, because the mean of its divisors is an integer number (18184569).

Almost surely, 2^194931216 is an apocalyptic number.

194931216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

194931216 is an abundant number, since it is smaller than the sum of its proper divisors (350605854).

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

194931216 is a wasteful number, since it uses less digits than its factorization.

194931216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353703 (or 1353694 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 194931216 is about 13961.7769642693. The cubic root of 194931216 is about 579.8208086952.

The spelling of 194931216 in words is "one hundred ninety-four million, nine hundred thirty-one thousand, two hundred sixteen".