194557213 has 8 divisors (see below), whose sum is σ = 197920800. Its totient is φ = 191207280.

The previous prime is 194557193. The next prime is 194557247. The reversal of 194557213 is 312755491.

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

It is not a de Polignac number, because 194557213 - 2¹³ = 194549021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194557273) 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, 27738 + ... + 34036.

It is an arithmetic number, because the mean of its divisors is an integer number (24740100).

Almost surely, 2^194557213 is an apocalyptic number.

It is an amenable number.

194557213 is a deficient number, since it is larger than the sum of its proper divisors (3363587).

194557213 is an equidigital number, since it uses as much as digits as its factorization.

194557213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6827.

The product of its digits is 37800, while the sum is 37.

The square root of 194557213 is about 13948.3767155895. The cubic root of 194557213 is about 579.4497486478.

The spelling of 194557213 in words is "one hundred ninety-four million, five hundred fifty-seven thousand, two hundred thirteen".