181372256 has 48 divisors (see below), whose sum is σ = 387684864. Its totient is φ = 83026944.

The previous prime is 181372241. The next prime is 181372259. The reversal of 181372256 is 652273181.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181372259) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 51116 + ... + 54548.

It is an arithmetic number, because the mean of its divisors is an integer number (8076768).

Almost surely, 2^181372256 is an apocalyptic number.

181372256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 181372256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193842432).

181372256 is an abundant number, since it is smaller than the sum of its proper divisors (206312608).

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

181372256 is a wasteful number, since it uses less digits than its factorization.

181372256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583 (or 3575 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 181372256 is about 13467.4517262918. The cubic root of 181372256 is about 566.0528113142.

The spelling of 181372256 in words is "one hundred eighty-one million, three hundred seventy-two thousand, two hundred fifty-six".