181225345 has 16 divisors (see below), whose sum is σ = 249919488. Its totient is φ = 123577920.

The previous prime is 181225309. The next prime is 181225351. The reversal of 181225345 is 543522181.

It is not a de Polignac number, because 181225345 - 2¹¹ = 181223297 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7969 + ... + 20638.

It is an arithmetic number, because the mean of its divisors is an integer number (15619968).

Almost surely, 2^181225345 is an apocalyptic number.

It is an amenable number.

181225345 is a deficient number, since it is larger than the sum of its proper divisors (68694143).

181225345 is a wasteful number, since it uses less digits than its factorization.

181225345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28800.

The product of its digits is 9600, while the sum is 31.

The square root of 181225345 is about 13461.9963229827. The cubic root of 181225345 is about 565.8999363202.

The spelling of 181225345 in words is "one hundred eighty-one million, two hundred twenty-five thousand, three hundred forty-five".