31231302231313 has 8 divisors (see below), whose sum is σ = 32178106607400. Its totient is φ = 30297739874688.

The previous prime is 31231302231301. The next prime is 31231302231329. The reversal of 31231302231313 is 31313220313213.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3647882263249 + 27583419968064 = 1909943^2 + 5251992^2 .

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 31231302231313 - 2²¹ = 31231300134161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231302231373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3310500078 + ... + 3310509511.

It is an arithmetic number, because the mean of its divisors is an integer number (4022263325925).

Almost surely, 2^{31231302231313} is an apocalyptic number.

It is an amenable number.

31231302231313 is a deficient number, since it is larger than the sum of its proper divisors (946804376087).

31231302231313 is an equidigital number, since it uses as much as digits as its factorization.

31231302231313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6621009731.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31231302231313 its reverse (31313220313213), we get a palindrome (62544522544526).

The spelling of 31231302231313 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred two million, two hundred thirty-one thousand, three hundred thirteen".