40204543 has 2 divisors, whose sum is σ = 40204544. Its totient is φ = 40204542.

The previous prime is 40204511. The next prime is 40204561. The reversal of 40204543 is 34540204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40204543 - 2⁵ = 40204511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40204243) 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, 20102271 + 20102272.

It is an arithmetic number, because the mean of its divisors is an integer number (20102272).

Almost surely, 2^40204543 is an apocalyptic number.

40204543 is a deficient number, since it is larger than the sum of its proper divisors (1).

40204543 is an equidigital number, since it uses as much as digits as its factorization.

40204543 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 22.

The square root of 40204543 is about 6340.7052446869. The cubic root of 40204543 is about 342.5771378640.

Adding to 40204543 its reverse (34540204), we get a palindrome (74744747).

The spelling of 40204543 in words is "forty million, two hundred four thousand, five hundred forty-three".