40845131 has 2 divisors, whose sum is σ = 40845132. Its totient is φ = 40845130.

The previous prime is 40845121. The next prime is 40845149. The reversal of 40845131 is 13154804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40845131 - 2¹⁸ = 40582987 is a prime.

It is a super-2 number, since 2×40845131² = 3336649452814322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40845131.

It is not a weakly prime, because it can be changed into another prime (40845121) 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, 20422565 + 20422566.

It is an arithmetic number, because the mean of its divisors is an integer number (20422566).

Almost surely, 2^40845131 is an apocalyptic number.

40845131 is a deficient number, since it is larger than the sum of its proper divisors (1).

40845131 is an equidigital number, since it uses as much as digits as its factorization.

40845131 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 26.

The square root of 40845131 is about 6391.0195587246. The cubic root of 40845131 is about 344.3870120414.

Adding to 40845131 its reverse (13154804), we get a palindrome (53999935).

The spelling of 40845131 in words is "forty million, eight hundred forty-five thousand, one hundred thirty-one".