40521443 has 2 divisors, whose sum is σ = 40521444. Its totient is φ = 40521442.

The previous prime is 40521427. The next prime is 40521457. The reversal of 40521443 is 34412504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40521443 - 2⁴ = 40521427 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40521413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20260721 + 20260722.

It is an arithmetic number, because the mean of its divisors is an integer number (20260722).

Almost surely, 2^40521443 is an apocalyptic number.

40521443 is a deficient number, since it is larger than the sum of its proper divisors (1).

40521443 is an equidigital number, since it uses as much as digits as its factorization.

40521443 is an evil number, because the sum of its binary digits is even.

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

The square root of 40521443 is about 6365.6455289311. The cubic root of 40521443 is about 343.4748697456.

Adding to 40521443 its reverse (34412504), we get a palindrome (74933947).

The spelling of 40521443 in words is "forty million, five hundred twenty-one thousand, four hundred forty-three".