40105631 has 2 divisors, whose sum is σ = 40105632. Its totient is φ = 40105630.

The previous prime is 40105619. The next prime is 40105643. The reversal of 40105631 is 13650104.

It is a balanced prime because it is at equal distance from previous prime (40105619) and next prime (40105643).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40105631 is a prime.

It is a super-2 number, since 2×40105631² = 3216923275816322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40105651) 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, 20052815 + 20052816.

It is an arithmetic number, because the mean of its divisors is an integer number (20052816).

Almost surely, 2^40105631 is an apocalyptic number.

40105631 is a deficient number, since it is larger than the sum of its proper divisors (1).

40105631 is an equidigital number, since it uses as much as digits as its factorization.

40105631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 40105631 is about 6332.9006782043. The cubic root of 40105631 is about 342.2959688422.

Adding to 40105631 its reverse (13650104), we get a palindrome (53755735).

The spelling of 40105631 in words is "forty million, one hundred five thousand, six hundred thirty-one".