181356412 has 12 divisors (see below), whose sum is σ = 320183136. Its totient is φ = 89875520.

The previous prime is 181356319. The next prime is 181356431. The reversal of 181356412 is 214653181.

181356412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 200164 + ... + 201067.

It is an arithmetic number, because the mean of its divisors is an integer number (26681928).

Almost surely, 2^181356412 is an apocalyptic number.

It is an amenable number.

181356412 is a deficient number, since it is larger than the sum of its proper divisors (138826724).

181356412 is a wasteful number, since it uses less digits than its factorization.

181356412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401348 (or 401346 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 181356412 is about 13466.8634804100. The cubic root of 181356412 is about 566.0363280840.

The spelling of 181356412 in words is "one hundred eighty-one million, three hundred fifty-six thousand, four hundred twelve".