194225220 has 324 divisors, whose sum is σ = 735163884. Its totient is φ = 41368320.

The previous prime is 194225219. The next prime is 194225279. The reversal of 194225220 is 22522491.

It is a happy number.

194225220 is a `hidden beast` number, since 19 + 422 + 5 + 220 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31203396 + 163021824 = 5586^2 + 12768^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 3183990 + ... + 3184050.

Almost surely, 2^194225220 is an apocalyptic number.

194225220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194225220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367581942).

194225220 is an abundant number, since it is smaller than the sum of its proper divisors (540938664).

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

194225220 is a wasteful number, since it uses less digits than its factorization.

194225220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 194225220 is about 13936.4708588652. The cubic root of 194225220 is about 579.1199694133.

It can be divided in two parts, 19422 and 5220, that added together give a palindrome (24642).

The spelling of 194225220 in words is "one hundred ninety-four million, two hundred twenty-five thousand, two hundred twenty".