181226725 has 24 divisors (see below), whose sum is σ = 231181632. Its totient is φ = 140851200.

The previous prime is 181226723. The next prime is 181226741. The reversal of 181226725 is 527622181.

It is a happy number.

It is not a de Polignac number, because 181226725 - 2¹ = 181226723 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181226723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 282405 + ... + 283045.

It is an arithmetic number, because the mean of its divisors is an integer number (9632568).

Almost surely, 2^181226725 is an apocalyptic number.

It is an amenable number.

181226725 is a deficient number, since it is larger than the sum of its proper divisors (49954907).

181226725 is a wasteful number, since it uses less digits than its factorization.

181226725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957 (or 952 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 181226725 is about 13462.0475782847. The cubic root of 181226725 is about 565.9013727269.

The spelling of 181226725 in words is "one hundred eighty-one million, two hundred twenty-six thousand, seven hundred twenty-five".