31332131323013 has 4 divisors (see below), whose sum is σ = 31998772415040. Its totient is φ = 30665490230988.

The previous prime is 31332131323001. The next prime is 31332131323033. The reversal of 31332131323013 is 31032313123313.

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 31332131323013 - 2¹⁰ = 31332131321989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31332131323033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333320545943 + ... + 333320546036.

It is an arithmetic number, because the mean of its divisors is an integer number (7999693103760).

Almost surely, 2^{31332131323013} is an apocalyptic number.

It is an amenable number.

31332131323013 is a deficient number, since it is larger than the sum of its proper divisors (666641092027).

31332131323013 is an equidigital number, since it uses as much as digits as its factorization.

31332131323013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666641092026.

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 31332131323013 its reverse (31032313123313), we get a palindrome (62364444446326).

The spelling of 31332131323013 in words is "thirty-one trillion, three hundred thirty-two billion, one hundred thirty-one million, three hundred twenty-three thousand, thirteen".