57443581 has 12 divisors (see below), whose sum is σ = 64676668. Its totient is φ = 50713344.

The previous prime is 57443569. The next prime is 57443591. The reversal of 57443581 is 18534475.

It can be written as a sum of positive squares in 2 ways, for example, as 22231225 + 35212356 = 4715^2 + 5934^2 .

It is not a de Polignac number, because 57443581 - 2⁵ = 57443549 is a prime.

It is a super-2 number, since 2×57443581² = 6599529996207122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57443581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57443591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2701 + ... + 11053.

Almost surely, 2^57443581 is an apocalyptic number.

It is an amenable number.

57443581 is a deficient number, since it is larger than the sum of its proper divisors (7233087).

57443581 is a wasteful number, since it uses less digits than its factorization.

57443581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8412 (or 8389 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 57443581 is about 7579.1543723558. The cubic root of 57443581 is about 385.8458515387.

The spelling of 57443581 in words is "fifty-seven million, four hundred forty-three thousand, five hundred eighty-one".