31011201313 has 4 divisors (see below), whose sum is σ = 31014218628. Its totient is φ = 31008184000.

The previous prime is 31011201281. The next prime is 31011201337. The reversal of 31011201313 is 31310211013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31310211013 = 239 ⋅131005067.

It can be written as a sum of positive squares in 2 ways, for example, as 18240393249 + 12770808064 = 135057^2 + 113008^2 .

It is a cyclic number.

It is not a de Polignac number, because 31011201313 - 2⁵ = 31011201281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31011201383) 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, 1493188 + ... + 1513813.

It is an arithmetic number, because the mean of its divisors is an integer number (7753554657).

Almost surely, 2^31011201313 is an apocalyptic number.

It is an amenable number.

31011201313 is a deficient number, since it is larger than the sum of its proper divisors (3017315).

31011201313 is a wasteful number, since it uses less digits than its factorization.

31011201313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3017314.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 31011201313 its reverse (31310211013), we get a palindrome (62321412326).

It can be divided in two parts, 31011 and 201313, that added together give a square (232324 = 482²).

The spelling of 31011201313 in words is "thirty-one billion, eleven million, two hundred one thousand, three hundred thirteen".