31313221344241 has 4 divisors (see below), whose sum is σ = 31313236081984. Its totient is φ = 31313206606500.

The previous prime is 31313221344217. The next prime is 31313221344247. The reversal of 31313221344241 is 14244312231313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31313221344241 - 2⁷ = 31313221344113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31313221344197 and 31313221344206.

It is not an unprimeable number, because it can be changed into a prime (31313221344247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3507285 + ... + 8656066.

It is an arithmetic number, because the mean of its divisors is an integer number (7828309020496).

Almost surely, 2^{31313221344241} is an apocalyptic number.

It is an amenable number.

31313221344241 is a deficient number, since it is larger than the sum of its proper divisors (14737743).

31313221344241 is a wasteful number, since it uses less digits than its factorization.

31313221344241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14737742.

The product of its digits is 41472, while the sum is 34.

Adding to 31313221344241 its reverse (14244312231313), we get a palindrome (45557533575554).

The spelling of 31313221344241 in words is "thirty-one trillion, three hundred thirteen billion, two hundred twenty-one million, three hundred forty-four thousand, two hundred forty-one".