181144252 has 12 divisors (see below), whose sum is σ = 333686920. Its totient is φ = 85805136.

The previous prime is 181144211. The next prime is 181144279. The reversal of 181144252 is 252441181.

It is a self number, because there is not a number n which added to its sum of digits gives 181144252.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1191663 + ... + 1191814.

Almost surely, 2^181144252 is an apocalyptic number.

It is an amenable number.

181144252 is a deficient number, since it is larger than the sum of its proper divisors (152542668).

181144252 is a wasteful number, since it uses less digits than its factorization.

181144252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2383500 (or 2383498 counting only the distinct ones).

The product of its digits is 2560, while the sum is 28.

The square root of 181144252 is about 13458.9840626995. The cubic root of 181144252 is about 565.8155158801.

It can be divided in two parts, 18114 and 4252, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 181144252 in words is "one hundred eighty-one million, one hundred forty-four thousand, two hundred fifty-two".