194212158225 has 24 divisors (see below), whose sum is σ = 322256665920. Its totient is φ = 103205872320.

The previous prime is 194212158157. The next prime is 194212158247. The reversal of 194212158225 is 522851212491.

It is a happy number.

It is not a de Polignac number, because 194212158225 - 2²⁹ = 193675287313 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4653405 + ... + 4694954.

It is an arithmetic number, because the mean of its divisors is an integer number (13427361080).

Almost surely, 2^194212158225 is an apocalyptic number.

194212158225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

194212158225 is a deficient number, since it is larger than the sum of its proper divisors (128044507695).

194212158225 is a wasteful number, since it uses less digits than its factorization.

194212158225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9348649 (or 9348644 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The spelling of 194212158225 in words is "one hundred ninety-four billion, two hundred twelve million, one hundred fifty-eight thousand, two hundred twenty-five".