43204541 has 2 divisors, whose sum is σ = 43204542. Its totient is φ = 43204540.

The previous prime is 43204517. The next prime is 43204543. The reversal of 43204541 is 14540234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40576900 + 2627641 = 6370^2 + 1621^2 .

It is a cyclic number.

It is not a de Polignac number, because 43204541 - 2⁶ = 43204477 is a prime.

It is a Sophie Germain prime.

Together with 43204543, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43204543) 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 as a sum of consecutive naturals, namely, 21602270 + 21602271.

It is an arithmetic number, because the mean of its divisors is an integer number (21602271).

Almost surely, 2^43204541 is an apocalyptic number.

It is an amenable number.

43204541 is a deficient number, since it is larger than the sum of its proper divisors (1).

43204541 is an equidigital number, since it uses as much as digits as its factorization.

43204541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 43204541 is about 6573.0161265586. The cubic root of 43204541 is about 350.8944225664.

Adding to 43204541 its reverse (14540234), we get a palindrome (57744775).

The spelling of 43204541 in words is "forty-three million, two hundred four thousand, five hundred forty-one".