43423553 has 2 divisors, whose sum is σ = 43423554. Its totient is φ = 43423552.

The previous prime is 43423453. The next prime is 43423577. The reversal of 43423553 is 35532434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42094144 + 1329409 = 6488^2 + 1153^2 .

It is a cyclic number.

It is not a de Polignac number, because 43423553 - 2⁸ = 43423297 is a prime.

It is not a weakly prime, because it can be changed into another prime (43423153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21711776 + 21711777.

It is an arithmetic number, because the mean of its divisors is an integer number (21711777).

Almost surely, 2^43423553 is an apocalyptic number.

It is an amenable number.

43423553 is a deficient number, since it is larger than the sum of its proper divisors (1).

43423553 is an equidigital number, since it uses as much as digits as its factorization.

43423553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 29.

The square root of 43423553 is about 6589.6549985564. The cubic root of 43423553 is about 351.4863402683.

Adding to 43423553 its reverse (35532434), we get a palindrome (78955987).

The spelling of 43423553 in words is "forty-three million, four hundred twenty-three thousand, five hundred fifty-three".