31130032321313 has 4 divisors (see below), whose sum is σ = 31130347785408. Its totient is φ = 31129716857220.

The previous prime is 31130032321301. The next prime is 31130032321327. The reversal of 31130032321313 is 31312323003113.

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 31130032321313 - 2⁸ = 31130032321057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31130032321363) 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, 157583981 + ... + 157781402.

It is an arithmetic number, because the mean of its divisors is an integer number (7782586946352).

Almost surely, 2^{31130032321313} is an apocalyptic number.

It is an amenable number.

31130032321313 is a deficient number, since it is larger than the sum of its proper divisors (315464095).

31130032321313 is an equidigital number, since it uses as much as digits as its factorization.

31130032321313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315464094.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31130032321313 its reverse (31312323003113), we get a palindrome (62442355324426).

The spelling of 31130032321313 in words is "thirty-one trillion, one hundred thirty billion, thirty-two million, three hundred twenty-one thousand, three hundred thirteen".