181352272 has 10 divisors (see below), whose sum is σ = 351370058. Its totient is φ = 90676128.

The previous prime is 181352251. The next prime is 181352279. The reversal of 181352272 is 272253181.

It can be written as a sum of positive squares in only one way, i.e., 136515856 + 44836416 = 11684^2 + 6696^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181352279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5667243 + ... + 5667274.

Almost surely, 2^181352272 is an apocalyptic number.

It is an amenable number.

181352272 is a deficient number, since it is larger than the sum of its proper divisors (170017786).

181352272 is a wasteful number, since it uses less digits than its factorization.

181352272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11334525 (or 11334519 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 181352272 is about 13466.7097689079. The cubic root of 181352272 is about 566.0320208965.

Subtracting 181352272 from its reverse (272253181), we obtain a palindrome (90900909).

The spelling of 181352272 in words is "one hundred eighty-one million, three hundred fifty-two thousand, two hundred seventy-two".