225180581 has 4 divisors (see below), whose sum is σ = 225266892. Its totient is φ = 225094272.

The previous prime is 225180523. The next prime is 225180583. The reversal of 225180581 is 185081522.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130896481 + 94284100 = 11441^2 + 9710^2 .

It is a cyclic number.

It is not a de Polignac number, because 225180581 - 2¹⁰ = 225179557 is a prime.

It is a super-2 number, since 2×225180581² = 101412588118995122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225180583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39116 + ... + 44501.

It is an arithmetic number, because the mean of its divisors is an integer number (56316723).

Almost surely, 2^225180581 is an apocalyptic number.

It is an amenable number.

225180581 is a deficient number, since it is larger than the sum of its proper divisors (86311).

225180581 is an equidigital number, since it uses as much as digits as its factorization.

225180581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86310.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 225180581 is about 15006.0181593919. The cubic root of 225180581 is about 608.3828716190.

The spelling of 225180581 in words is "two hundred twenty-five million, one hundred eighty thousand, five hundred eighty-one".