56481181 has 4 divisors (see below), whose sum is σ = 57407164. Its totient is φ = 55555200.

The previous prime is 56481179. The next prime is 56481193. The reversal of 56481181 is 18118465.

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 2752281 + 53728900 = 1659^2 + 7330^2 .

It is a cyclic number.

It is not a de Polignac number, because 56481181 - 2¹ = 56481179 is a prime.

It is a super-2 number, since 2×56481181² = 6380247614309522, 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 (56485181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462900 + ... + 463021.

It is an arithmetic number, because the mean of its divisors is an integer number (14351791).

Almost surely, 2^56481181 is an apocalyptic number.

It is an amenable number.

56481181 is a deficient number, since it is larger than the sum of its proper divisors (925983).

56481181 is an equidigital number, since it uses as much as digits as its factorization.

56481181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925982.

The product of its digits is 7680, while the sum is 34.

The square root of 56481181 is about 7515.3962636710. The cubic root of 56481181 is about 383.6789059342.

The spelling of 56481181 in words is "fifty-six million, four hundred eighty-one thousand, one hundred eighty-one".