31323220032113 has 32 divisors (see below), whose sum is σ = 34289726042880. Its totient is φ = 28526819650560.

The previous prime is 31323220032101. The next prime is 31323220032131. The reversal of 31323220032113 is 31123002232313.

It is a cyclic number.

It is not a de Polignac number, because 31323220032113 - 2³⁸ = 31048342125169 is a prime.

It is a super-2 number, since 2×31323220032113² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31323270032113) 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 31 ways as a sum of consecutive naturals, for example, 48051203 + ... + 48698711.

It is an arithmetic number, because the mean of its divisors is an integer number (1071553938840).

Almost surely, 2^{31323220032113} is an apocalyptic number.

It is an amenable number.

31323220032113 is a deficient number, since it is larger than the sum of its proper divisors (2966506010767).

31323220032113 is a wasteful number, since it uses less digits than its factorization.

31323220032113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648809.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31323220032113 its reverse (31123002232313), we get a palindrome (62446222264426).

The spelling of 31323220032113 in words is "thirty-one trillion, three hundred twenty-three billion, two hundred twenty million, thirty-two thousand, one hundred thirteen".