40557443 has 2 divisors, whose sum is σ = 40557444. Its totient is φ = 40557442.

The previous prime is 40557403. The next prime is 40557449. The reversal of 40557443 is 34475504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40557443 - 2¹⁰ = 40556419 is a prime.

It is not a weakly prime, because it can be changed into another prime (40557449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20278721 + 20278722.

It is an arithmetic number, because the mean of its divisors is an integer number (20278722).

Almost surely, 2^40557443 is an apocalyptic number.

40557443 is a deficient number, since it is larger than the sum of its proper divisors (1).

40557443 is an equidigital number, since it uses as much as digits as its factorization.

40557443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 40557443 is about 6368.4725798263. The cubic root of 40557443 is about 343.5765561155.

The spelling of 40557443 in words is "forty million, five hundred fifty-seven thousand, four hundred forty-three".