40011031 has 2 divisors, whose sum is σ = 40011032. Its totient is φ = 40011030.

The previous prime is 40011019. The next prime is 40011067. The reversal of 40011031 is 13011004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40011031 is a prime.

It is a super-2 number, since 2×40011031² = 3201765203365922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40010999 and 40011017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40011001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20005515 + 20005516.

It is an arithmetic number, because the mean of its divisors is an integer number (20005516).

Almost surely, 2^40011031 is an apocalyptic number.

40011031 is a deficient number, since it is larger than the sum of its proper divisors (1).

40011031 is an equidigital number, since it uses as much as digits as its factorization.

40011031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 40011031 is about 6325.4273373425. The cubic root of 40011031 is about 342.0266243536.

Adding to 40011031 its reverse (13011004), we get a palindrome (53022035).

The spelling of 40011031 in words is "forty million, eleven thousand, thirty-one".