31660941313 has 4 divisors (see below), whose sum is σ = 32752697940. Its totient is φ = 30569184688.

The previous prime is 31660941217. The next prime is 31660941343. The reversal of 31660941313 is 31314906613.

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 12230811649 + 19430129664 = 110593^2 + 139392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31660941313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31660941343) 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, 545878270 + ... + 545878327.

It is an arithmetic number, because the mean of its divisors is an integer number (8188174485).

Almost surely, 2^31660941313 is an apocalyptic number.

It is an amenable number.

31660941313 is a deficient number, since it is larger than the sum of its proper divisors (1091756627).

31660941313 is a wasteful number, since it uses less digits than its factorization.

31660941313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091756626.

The product of its (nonzero) digits is 34992, while the sum is 37.

The spelling of 31660941313 in words is "thirty-one billion, six hundred sixty million, nine hundred forty-one thousand, three hundred thirteen".