194582443225 has 9 divisors (see below), whose sum is σ = 241284964543. Its totient is φ = 155664190120.

The previous prime is 194582443219. The next prime is 194582443229. The reversal of 194582443225 is 522344285491.

The square root of 194582443225 is 441115.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 70049679561 + 124532763664 = 264669^2 + 352892^2 .

It is not a de Polignac number, because 194582443225 - 2⁹ = 194582442713 is a prime.

It is a super-2 number, since 2×194582443225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194582443229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2161464 + ... + 2249686.

Almost surely, 2^194582443225 is an apocalyptic number.

194582443225 is the 441115-th square number.

194582443225 is the 220558-th centered octagonal number.

It is an amenable number.

194582443225 is a deficient number, since it is larger than the sum of its proper divisors (46702521318).

194582443225 is an frugal number, since it uses more digits than its factorization.

194582443225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176456 (or 88228 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 49.

Multiplying 194582443225 by its sum of digits (49), we get a square (9534539718025 = 3087805²).

The spelling of 194582443225 in words is "one hundred ninety-four billion, five hundred eighty-two million, four hundred forty-three thousand, two hundred twenty-five".