440343131 has 4 divisors (see below), whose sum is σ = 441125832. Its totient is φ = 439560432.

The previous prime is 440343121. The next prime is 440343139. The reversal of 440343131 is 131343044.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440343131 is a prime.

It is a super-2 number, since 2×440343131² = 387804146037766322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440343097 and 440343106.

It is not an unprimeable number, because it can be changed into a prime (440343139) 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 in 3 ways as a sum of consecutive naturals, for example, 390506 + ... + 391631.

It is an arithmetic number, because the mean of its divisors is an integer number (110281458).

Almost surely, 2^440343131 is an apocalyptic number.

440343131 is a deficient number, since it is larger than the sum of its proper divisors (782701).

440343131 is an equidigital number, since it uses as much as digits as its factorization.

440343131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782700.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 440343131 is about 20984.3544337204. The cubic root of 440343131 is about 760.7881545491.

Adding to 440343131 its reverse (131343044), we get a palindrome (571686175).

The spelling of 440343131 in words is "four hundred forty million, three hundred forty-three thousand, one hundred thirty-one".