5643451 has 4 divisors (see below), whose sum is σ = 6156504. Its totient is φ = 5130400.

The previous prime is 5643427. The next prime is 5643479. The reversal of 5643451 is 1543465.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5643451 - 2²¹ = 3546299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5643851) 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 3 ways as a sum of consecutive naturals, for example, 256510 + ... + 256531.

It is an arithmetic number, because the mean of its divisors is an integer number (1539126).

Almost surely, 2^5643451 is an apocalyptic number.

5643451 is a deficient number, since it is larger than the sum of its proper divisors (513053).

5643451 is a wasteful number, since it uses less digits than its factorization.

5643451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513052.

The product of its digits is 7200, while the sum is 28.

The square root of 5643451 is about 2375.5948728687. The cubic root of 5643451 is about 178.0389070361.

The spelling of 5643451 in words is "five million, six hundred forty-three thousand, four hundred fifty-one".