40571813 has 2 divisors, whose sum is σ = 40571814. Its totient is φ = 40571812.

The previous prime is 40571761. The next prime is 40571827. The reversal of 40571813 is 31817504.

40571813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40538689 + 33124 = 6367^2 + 182^2 .

It is a cyclic number.

It is not a de Polignac number, because 40571813 - 2⁶ = 40571749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40571863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20285906 + 20285907.

It is an arithmetic number, because the mean of its divisors is an integer number (20285907).

Almost surely, 2^40571813 is an apocalyptic number.

It is an amenable number.

40571813 is a deficient number, since it is larger than the sum of its proper divisors (1).

40571813 is an equidigital number, since it uses as much as digits as its factorization.

40571813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 40571813 is about 6369.6006939211. The cubic root of 40571813 is about 343.6171291214.

The spelling of 40571813 in words is "forty million, five hundred seventy-one thousand, eight hundred thirteen".