56091481 has 8 divisors (see below), whose sum is σ = 58131720. Its totient is φ = 54058368.

The previous prime is 56091467. The next prime is 56091527. The reversal of 56091481 is 18419065.

It can be written as a sum of positive squares in 4 ways, for example, as 31539456 + 24552025 = 5616^2 + 4955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56091481 - 2⁷ = 56091353 is a prime.

It is a super-2 number, since 2×56091481² = 6292508481546722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56098481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18205 + ... + 21061.

It is an arithmetic number, because the mean of its divisors is an integer number (7266465).

Almost surely, 2^56091481 is an apocalyptic number.

It is an amenable number.

56091481 is a deficient number, since it is larger than the sum of its proper divisors (2040239).

56091481 is a wasteful number, since it uses less digits than its factorization.

56091481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 56091481 is about 7489.4246107428. The cubic root of 56091481 is about 382.7944528080.

The spelling of 56091481 in words is "fifty-six million, ninety-one thousand, four hundred eighty-one".