188181225 has 120 divisors (see below), whose sum is σ = 377500640. Its totient is φ = 92378880.

The previous prime is 188181209. The next prime is 188181229. The reversal of 188181225 is 522181881.

It is not a de Polignac number, because 188181225 - 2⁴ = 188181209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188181225.

It is not an unprimeable number, because it can be changed into a prime (188181229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2577789 + ... + 2577861.

Almost surely, 2^188181225 is an apocalyptic number.

188181225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

188181225 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

188181225 is a wasteful number, since it uses less digits than its factorization.

188181225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 167 counting only the distinct ones).

The product of its digits is 10240, while the sum is 36.

The square root of 188181225 is about 13717.9162047302. The cubic root of 188181225 is about 573.0494461318.

The spelling of 188181225 in words is "one hundred eighty-eight million, one hundred eighty-one thousand, two hundred twenty-five".