40303031 has 2 divisors, whose sum is σ = 40303032. Its totient is φ = 40303030.

The previous prime is 40303019. The next prime is 40303033. The reversal of 40303031 is 13030304.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40303031 - 2⁶ = 40302967 is a prime.

It is a super-2 number, since 2×40303031² = 3248668615573922, which contains 22 as substring.

Together with 40303033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40302997 and 40303015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40303033) 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, 20151515 + 20151516.

It is an arithmetic number, because the mean of its divisors is an integer number (20151516).

Almost surely, 2^40303031 is an apocalyptic number.

40303031 is a deficient number, since it is larger than the sum of its proper divisors (1).

40303031 is an equidigital number, since it uses as much as digits as its factorization.

40303031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 40303031 is about 6348.4668227849. The cubic root of 40303031 is about 342.8566437906.

Adding to 40303031 its reverse (13030304), we get a palindrome (53333335).

It can be divided in two parts, 4030303 and 1, that added together give a palindrome (4030304).

The spelling of 40303031 in words is "forty million, three hundred three thousand, thirty-one".