194231813 has 8 divisors (see below), whose sum is σ = 204811200. Its totient is φ = 183688128.

The previous prime is 194231773. The next prime is 194231819. The reversal of 194231813 is 318132491.

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

It is a cyclic number.

It is not a de Polignac number, because 194231813 - 2¹² = 194227717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 194231813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194231819) 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, 2648 + ... + 19886.

It is an arithmetic number, because the mean of its divisors is an integer number (25601400).

Almost surely, 2^194231813 is an apocalyptic number.

It is an amenable number.

194231813 is a deficient number, since it is larger than the sum of its proper divisors (10579387).

194231813 is a wasteful number, since it uses less digits than its factorization.

194231813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17851.

The product of its digits is 5184, while the sum is 32.

The square root of 194231813 is about 13936.7073945032. The cubic root of 194231813 is about 579.1265221063.

The spelling of 194231813 in words is "one hundred ninety-four million, two hundred thirty-one thousand, eight hundred thirteen".