181105272 has 24 divisors (see below), whose sum is σ = 490493640. Its totient is φ = 60368400.

The previous prime is 181105271. The next prime is 181105291. The reversal of 181105272 is 272501181.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181105271) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1257604 + ... + 1257747.

It is an arithmetic number, because the mean of its divisors is an integer number (20437235).

Almost surely, 2^181105272 is an apocalyptic number.

181105272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181105272 is an abundant number, since it is smaller than the sum of its proper divisors (309388368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

181105272 is a wasteful number, since it uses less digits than its factorization.

181105272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515363 (or 2515356 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 181105272 is about 13457.5358814309. The cubic root of 181105272 is about 565.7749274710.

The spelling of 181105272 in words is "one hundred eighty-one million, one hundred five thousand, two hundred seventy-two".