194542221 has 8 divisors (see below), whose sum is σ = 259762464. Its totient is φ = 129508400.

The previous prime is 194542199. The next prime is 194542247. The reversal of 194542221 is 122245491.

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 194542221 - 2⁷ = 194542093 is a prime.

It is a super-2 number, since 2×194542221² = 75693351503225682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194542021) 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, 44151 + ... + 48356.

It is an arithmetic number, because the mean of its divisors is an integer number (32470308).

Almost surely, 2^194542221 is an apocalyptic number.

It is an amenable number.

194542221 is a deficient number, since it is larger than the sum of its proper divisors (65220243).

194542221 is an equidigital number, since it uses as much as digits as its factorization.

194542221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93211.

The product of its digits is 5760, while the sum is 30.

The square root of 194542221 is about 13947.8392950306. The cubic root of 194542221 is about 579.4348647076.

The spelling of 194542221 in words is "one hundred ninety-four million, five hundred forty-two thousand, two hundred twenty-one".