31113320233013 has 4 divisors (see below), whose sum is σ = 31142425304460. Its totient is φ = 31084215161568.

The previous prime is 31113320233001. The next prime is 31113320233057. The reversal of 31113320233013 is 31033202331113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18962393103889 + 12150927129124 = 4354583^2 + 3485818^2 .

It is a cyclic number.

It is not a de Polignac number, because 31113320233013 - 2¹⁸ = 31113319970869 is a prime.

It is a super-2 number, since 2×31113320233013² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113320233213) 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, 14552534120 + ... + 14552536257.

It is an arithmetic number, because the mean of its divisors is an integer number (7785606326115).

Almost surely, 2^{31113320233013} is an apocalyptic number.

It is an amenable number.

31113320233013 is a deficient number, since it is larger than the sum of its proper divisors (29105071447).

31113320233013 is a wasteful number, since it uses less digits than its factorization.

31113320233013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29105071446.

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

Adding to 31113320233013 its reverse (31033202331113), we get a palindrome (62146522564126).

The spelling of 31113320233013 in words is "thirty-one trillion, one hundred thirteen billion, three hundred twenty million, two hundred thirty-three thousand, thirteen".