40543553 has 2 divisors, whose sum is σ = 40543554. Its totient is φ = 40543552.

The previous prime is 40543541. The next prime is 40543571. The reversal of 40543553 is 35534504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37797904 + 2745649 = 6148^2 + 1657^2 .

It is a cyclic number.

It is not a de Polignac number, because 40543553 - 2⁸ = 40543297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40543513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20271776 + 20271777.

It is an arithmetic number, because the mean of its divisors is an integer number (20271777).

Almost surely, 2^40543553 is an apocalyptic number.

It is an amenable number.

40543553 is a deficient number, since it is larger than the sum of its proper divisors (1).

40543553 is an equidigital number, since it uses as much as digits as its factorization.

40543553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 29.

The square root of 40543553 is about 6367.3819580735. The cubic root of 40543553 is about 343.5373292567.

The spelling of 40543553 in words is "forty million, five hundred forty-three thousand, five hundred fifty-three".