31231311113 has 8 divisors (see below), whose sum is σ = 32011132608. Its totient is φ = 30458547184.

The previous prime is 31231311103. The next prime is 31231311121. The reversal of 31231311113 is 31111313213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31231311113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231311103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755431 + ... + 1773132.

It is an arithmetic number, because the mean of its divisors is an integer number (4001391576).

Almost surely, 2^31231311113 is an apocalyptic number.

It is an amenable number.

31231311113 is a deficient number, since it is larger than the sum of its proper divisors (779821495).

31231311113 is a wasteful number, since it uses less digits than its factorization.

31231311113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528783.

The product of its digits is 162, while the sum is 20.

Adding to 31231311113 its reverse (31111313213), we get a palindrome (62342624326).

The spelling of 31231311113 in words is "thirty-one billion, two hundred thirty-one million, three hundred eleven thousand, one hundred thirteen".