181883146 has 4 divisors (see below), whose sum is σ = 272824722. Its totient is φ = 90941572.

The previous prime is 181883131. The next prime is 181883147. The reversal of 181883146 is 641388181.

181883146 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 142683025 + 39200121 = 11945^2 + 6261^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 181883099 and 181883108.

It is not an unprimeable number, because it can be changed into a prime (181883147) 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 as a sum of consecutive naturals, namely, 45470785 + ... + 45470788.

Almost surely, 2^181883146 is an apocalyptic number.

181883146 is a deficient number, since it is larger than the sum of its proper divisors (90941576).

181883146 is an equidigital number, since it uses as much as digits as its factorization.

181883146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90941575.

The product of its digits is 36864, while the sum is 40.

The square root of 181883146 is about 13486.4059704578. The cubic root of 181883146 is about 566.5837995702.

The spelling of 181883146 in words is "one hundred eighty-one million, eight hundred eighty-three thousand, one hundred forty-six".