40308031 has 2 divisors, whose sum is σ = 40308032. Its totient is φ = 40308030.

The previous prime is 40308017. The next prime is 40308041. The reversal of 40308031 is 13080304.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40308031 - 2¹⁹ = 39783743 is a prime.

It is a super-2 number, since 2×40308031² = 3249474726193922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40308001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20154015 + 20154016.

It is an arithmetic number, because the mean of its divisors is an integer number (20154016).

Almost surely, 2^40308031 is an apocalyptic number.

40308031 is a deficient number, since it is larger than the sum of its proper divisors (1).

40308031 is an equidigital number, since it uses as much as digits as its factorization.

40308031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 40308031 is about 6348.8606064396. The cubic root of 40308031 is about 342.8708214863.

Adding to 40308031 its reverse (13080304), we get a palindrome (53388335).

The spelling of 40308031 in words is "forty million, three hundred eight thousand, thirty-one".