53640443 has 8 divisors (see below), whose sum is σ = 54412800. Its totient is φ = 52873128.

The previous prime is 53640437. The next prime is 53640451. The reversal of 53640443 is 34404635.

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 53640443 - 2⁴ = 53640427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53640403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23528 + ... + 25706.

It is an arithmetic number, because the mean of its divisors is an integer number (6801600).

Almost surely, 2^53640443 is an apocalyptic number.

53640443 is a deficient number, since it is larger than the sum of its proper divisors (772357).

53640443 is a wasteful number, since it uses less digits than its factorization.

53640443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 53640443 is about 7323.9636126895. The cubic root of 53640443 is about 377.1355323266.

The spelling of 53640443 in words is "fifty-three million, six hundred forty thousand, four hundred forty-three".