5643851 has 2 divisors, whose sum is σ = 5643852. Its totient is φ = 5643850.

The previous prime is 5643821. The next prime is 5643857. The reversal of 5643851 is 1583465.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5643851 - 2⁶ = 5643787 is a prime.

It is a super-2 number, since 2×5643851² = 63706108220402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (5643857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2821925 + 2821926.

It is an arithmetic number, because the mean of its divisors is an integer number (2821926).

Almost surely, 2^5643851 is an apocalyptic number.

5643851 is a deficient number, since it is larger than the sum of its proper divisors (1).

5643851 is an equidigital number, since it uses as much as digits as its factorization.

5643851 is an evil number, because the sum of its binary digits is even.

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

The square root of 5643851 is about 2375.6790608161. The cubic root of 5643851 is about 178.0431133205.

The spelling of 5643851 in words is "five million, six hundred forty-three thousand, eight hundred fifty-one".