5643381 has 4 divisors (see below), whose sum is σ = 7524512. Its totient is φ = 3762252.

The previous prime is 5643373. The next prime is 5643383. The reversal of 5643381 is 1833465.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5643381 - 2³ = 5643373 is a prime.

It is a super-2 number, since 2×5643381² = 63695498222322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5643383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 940561 + ... + 940566.

It is an arithmetic number, because the mean of its divisors is an integer number (1881128).

Almost surely, 2^5643381 is an apocalyptic number.

It is an amenable number.

5643381 is a deficient number, since it is larger than the sum of its proper divisors (1881131).

5643381 is a wasteful number, since it uses less digits than its factorization.

5643381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881130.

The product of its digits is 8640, while the sum is 30.

The square root of 5643381 is about 2375.5801396711. The cubic root of 5643381 is about 178.0381709159.

The spelling of 5643381 in words is "five million, six hundred forty-three thousand, three hundred eighty-one".