31343245321 has 8 divisors (see below), whose sum is σ = 33316102440. Its totient is φ = 29384736768.

The previous prime is 31343245313. The next prime is 31343245333. The reversal of 31343245321 is 12354234313.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20040366096 + 11302879225 = 141564^2 + 106315^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31343245321 - 2³ = 31343245313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31343245391) 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 7 ways as a sum of consecutive naturals, for example, 3582636 + ... + 3591373.

It is an arithmetic number, because the mean of its divisors is an integer number (4164512805).

Almost surely, 2^31343245321 is an apocalyptic number.

It is an amenable number.

31343245321 is a deficient number, since it is larger than the sum of its proper divisors (1972857119).

31343245321 is a wasteful number, since it uses less digits than its factorization.

31343245321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7174283.

The product of its digits is 25920, while the sum is 31.

Adding to 31343245321 its reverse (12354234313), we get a palindrome (43697479634).

The spelling of 31343245321 in words is "thirty-one billion, three hundred forty-three million, two hundred forty-five thousand, three hundred twenty-one".