181133025 has 24 divisors (see below), whose sum is σ = 299861760. Its totient is φ = 96479040.

The previous prime is 181133021. The next prime is 181133041. The reversal of 181133025 is 520331181.

It is not a de Polignac number, because 181133025 - 2² = 181133021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181132986 and 181133004.

It is not an unprimeable number, because it can be changed into a prime (181133021) 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 23 ways as a sum of consecutive naturals, for example, 102096 + ... + 103854.

It is an arithmetic number, because the mean of its divisors is an integer number (12494240).

Almost surely, 2^181133025 is an apocalyptic number.

181133025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

181133025 is a deficient number, since it is larger than the sum of its proper divisors (118728735).

181133025 is a wasteful number, since it uses less digits than its factorization.

181133025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145 (or 3140 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 181133025 is about 13458.5669742362. The cubic root of 181133025 is about 565.8038262240.

The spelling of 181133025 in words is "one hundred eighty-one million, one hundred thirty-three thousand, twenty-five".