181145208 has 16 divisors (see below), whose sum is σ = 452863080. Its totient is φ = 60381728.

The previous prime is 181145207. The next prime is 181145213. The reversal of 181145208 is 802541181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181145201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3773835 + ... + 3773882.

Almost surely, 2^181145208 is an apocalyptic number.

It is an amenable number.

181145208 is an abundant number, since it is smaller than the sum of its proper divisors (271717872).

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

181145208 is a wasteful number, since it uses less digits than its factorization.

181145208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7547726 (or 7547722 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 181145208 is about 13459.0195779633. The cubic root of 181145208 is about 565.8165112538.

Adding to 181145208 its reverse (802541181), we get a palindrome (983686389).

The spelling of 181145208 in words is "one hundred eighty-one million, one hundred forty-five thousand, two hundred eight".