31231133113 has 8 divisors (see below), whose sum is σ = 31699859400. Its totient is φ = 30765719808.

The previous prime is 31231133099. The next prime is 31231133137. The reversal of 31231133113 is 31133113213.

It can be written as a sum of positive squares in 4 ways, for example, as 16785016249 + 14446116864 = 129557^2 + 120192^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 31231133113 - 2¹³ = 31231124921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31231133173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 809248 + ... + 846961.

It is an arithmetic number, because the mean of its divisors is an integer number (3962482425).

Almost surely, 2^31231133113 is an apocalyptic number.

It is an amenable number.

31231133113 is a deficient number, since it is larger than the sum of its proper divisors (468726287).

31231133113 is a wasteful number, since it uses less digits than its factorization.

31231133113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656491.

The product of its digits is 486, while the sum is 22.

Adding to 31231133113 its reverse (31133113213), we get a palindrome (62364246326).

The spelling of 31231133113 in words is "thirty-one billion, two hundred thirty-one million, one hundred thirty-three thousand, one hundred thirteen".