43573 has 2 divisors, whose sum is σ = 43574. Its totient is φ = 43572.

The previous prime is 43543. The next prime is 43577. The reversal of 43573 is 37534.

43573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23409 + 20164 = 153^2 + 142^2 .

It is a cyclic number.

It is not a de Polignac number, because 43573 - 2⁵ = 43541 is a prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43577) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21786 + 21787.

It is an arithmetic number, because the mean of its divisors is an integer number (21787).

2⁴³⁵⁷³ is an apocalyptic number.

It is an amenable number.

43573 is a deficient number, since it is larger than the sum of its proper divisors (1).

43573 is an equidigital number, since it uses as much as digits as its factorization.

43573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 22.

The square root of 43573 is about 208.7414668915. The cubic root of 43573 is about 35.1889105046.

It can be divided in two parts, 43 and 573, that added together give a palindrome (616).

The spelling of 43573 in words is "forty-three thousand, five hundred seventy-three".