440143031 has 2 divisors, whose sum is σ = 440143032. Its totient is φ = 440143030.

The previous prime is 440143027. The next prime is 440143043. The reversal of 440143031 is 130341044.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 440143031 - 2² = 440143027 is a prime.

It is a super-2 number, since 2×440143031² = 387451775475733922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 440142994 and 440143012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440143091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220071515 + 220071516.

It is an arithmetic number, because the mean of its divisors is an integer number (220071516).

Almost surely, 2^440143031 is an apocalyptic number.

440143031 is a deficient number, since it is larger than the sum of its proper divisors (1).

440143031 is an equidigital number, since it uses as much as digits as its factorization.

440143031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 440143031 is about 20979.5860540669. The cubic root of 440143031 is about 760.6728983893.

Adding to 440143031 its reverse (130341044), we get a palindrome (570484075).

The spelling of 440143031 in words is "four hundred forty million, one hundred forty-three thousand, thirty-one".