31030023313 has 4 divisors (see below), whose sum is σ = 32855318820. Its totient is φ = 29204727808.

The previous prime is 31030023209. The next prime is 31030023319. The reversal of 31030023313 is 31332003013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31332003013 = 29 ⋅1080413897.

It can be written as a sum of positive squares in 2 ways, for example, as 16318274049 + 14711749264 = 127743^2 + 121292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31030023313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31030023319) 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, 912647728 + ... + 912647761.

It is an arithmetic number, because the mean of its divisors is an integer number (8213829705).

Almost surely, 2^31030023313 is an apocalyptic number.

It is an amenable number.

31030023313 is a deficient number, since it is larger than the sum of its proper divisors (1825295507).

31030023313 is a wasteful number, since it uses less digits than its factorization.

31030023313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825295506.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 31030023313 its reverse (31332003013), we get a palindrome (62362026326).

The spelling of 31030023313 in words is "thirty-one billion, thirty million, twenty-three thousand, three hundred thirteen".