40311431 has 2 divisors, whose sum is σ = 40311432. Its totient is φ = 40311430.

The previous prime is 40311391. The next prime is 40311443. The reversal of 40311431 is 13411304.

40311431 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 is a cyclic number.

It is not a de Polignac number, because 40311431 - 2¹⁰ = 40310407 is a prime.

It is a super-2 number, since 2×40311431² = 3250022938535522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40311461) 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, 20155715 + 20155716.

It is an arithmetic number, because the mean of its divisors is an integer number (20155716).

Almost surely, 2^40311431 is an apocalyptic number.

40311431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40311431 is an equidigital number, since it uses as much as digits as its factorization.

40311431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 40311431 is about 6349.1283653743. The cubic root of 40311431 is about 342.8804616498.

Adding to 40311431 its reverse (13411304), we get a palindrome (53722735).

The spelling of 40311431 in words is "forty million, three hundred eleven thousand, four hundred thirty-one".