181333156 has 9 divisors (see below), whose sum is σ = 317380161. Its totient is φ = 90653112.

The previous prime is 181333153. The next prime is 181333157. The reversal of 181333156 is 651333181.

The square root of 181333156 is 13466.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 180364900 + 968256 = 13430^2 + 984^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181333151) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 23566 + ... + 30298.

Almost surely, 2^181333156 is an apocalyptic number.

181333156 is the 13466-th square number.

It is an amenable number.

181333156 is a deficient number, since it is larger than the sum of its proper divisors (136047005).

181333156 is an frugal number, since it uses more digits than its factorization.

181333156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13470 (or 6735 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The cubic root of 181333156 is about 566.0121320761.

It can be divided in two parts, 1813 and 33156, that added together give a square (34969 = 187²).

The spelling of 181333156 in words is "one hundred eighty-one million, three hundred thirty-three thousand, one hundred fifty-six".