5643581 has 8 divisors (see below), whose sum is σ = 5854464. Its totient is φ = 5434560.

The previous prime is 5643571. The next prime is 5643587. The reversal of 5643581 is 1853465.

It is a happy number.

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 5643581 - 2¹⁴ = 5627197 is a prime.

It is a super-2 number, since 2×5643581² = 63700013007122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9221 + ... + 9813.

It is an arithmetic number, because the mean of its divisors is an integer number (731808).

Almost surely, 2^5643581 is an apocalyptic number.

It is an amenable number.

5643581 is a deficient number, since it is larger than the sum of its proper divisors (210883).

5643581 is a wasteful number, since it uses less digits than its factorization.

5643581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931.

The product of its digits is 14400, while the sum is 32.

The square root of 5643581 is about 2375.6222342788. The cubic root of 5643581 is about 178.0402741003.

The spelling of 5643581 in words is "five million, six hundred forty-three thousand, five hundred eighty-one".