31343644441 has 4 divisors (see below), whose sum is σ = 31394776612. Its totient is φ = 31292512272.

The previous prime is 31343644421. The next prime is 31343644477. The reversal of 31343644441 is 14444634313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14444634313 = 349 ⋅41388637.

It can be written as a sum of positive squares in 2 ways, for example, as 7572480400 + 23771164041 = 87020^2 + 154179^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31343644441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31343644441.

It is not an unprimeable number, because it can be changed into a prime (31343644421) 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, 25565166 + ... + 25566391.

It is an arithmetic number, because the mean of its divisors is an integer number (7848694153).

Almost surely, 2^31343644441 is an apocalyptic number.

It is an amenable number.

31343644441 is a deficient number, since it is larger than the sum of its proper divisors (51132171).

31343644441 is an equidigital number, since it uses as much as digits as its factorization.

31343644441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51132170.

The product of its digits is 165888, while the sum is 37.

The spelling of 31343644441 in words is "thirty-one billion, three hundred forty-three million, six hundred forty-four thousand, four hundred forty-one".