194226209 has 8 divisors (see below), whose sum is σ = 202210920. Its totient is φ = 186385536.

The previous prime is 194226199. The next prime is 194226239. The reversal of 194226209 is 902622491.

It can be written as a sum of positive squares in 4 ways, for example, as 76177984 + 118048225 = 8728^2 + 10865^2 .

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-194226209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194226239) 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, 33254 + ... + 38655.

It is an arithmetic number, because the mean of its divisors is an integer number (25276365).

Almost surely, 2^194226209 is an apocalyptic number.

It is an amenable number.

194226209 is a deficient number, since it is larger than the sum of its proper divisors (7984711).

194226209 is an equidigital number, since it uses as much as digits as its factorization.

194226209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72019.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 194226209 is about 13936.5063412607. The cubic root of 194226209 is about 579.1209523764.

The spelling of 194226209 in words is "one hundred ninety-four million, two hundred twenty-six thousand, two hundred nine".