40031273 has 2 divisors, whose sum is σ = 40031274. Its totient is φ = 40031272.

The previous prime is 40031269. The next prime is 40031279. The reversal of 40031273 is 37213004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35485849 + 4545424 = 5957^2 + 2132^2 .

It is a cyclic number.

It is not a de Polignac number, because 40031273 - 2² = 40031269 is a prime.

It is not a weakly prime, because it can be changed into another prime (40031279) 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, 20015636 + 20015637.

It is an arithmetic number, because the mean of its divisors is an integer number (20015637).

Almost surely, 2^40031273 is an apocalyptic number.

It is an amenable number.

40031273 is a deficient number, since it is larger than the sum of its proper divisors (1).

40031273 is an equidigital number, since it uses as much as digits as its factorization.

40031273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 40031273 is about 6327.0271850214. The cubic root of 40031273 is about 342.0842929145.

Adding to 40031273 its reverse (37213004), we get a palindrome (77244277).

It can be divided in two parts, 40031 and 273, that added together give a palindrome (40304).

The spelling of 40031273 in words is "forty million, thirty-one thousand, two hundred seventy-three".