31130313131231 has 8 divisors (see below), whose sum is σ = 31370167950000. Its totient is φ = 30890491931520.

The previous prime is 31130313131219. The next prime is 31130313131249. The reversal of 31130313131231 is 13213131303113.

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

It is not a de Polignac number, because 31130313131231 - 2¹⁴ = 31130313114847 is a prime.

It is a super-2 number, since 2×31130313131231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31130313131231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130313131261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6544106 + ... + 10251143.

It is an arithmetic number, because the mean of its divisors is an integer number (3921270993750).

Almost surely, 2^{31130313131231} is an apocalyptic number.

31130313131231 is a deficient number, since it is larger than the sum of its proper divisors (239854818769).

31130313131231 is a wasteful number, since it uses less digits than its factorization.

31130313131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16809529.

The product of its (nonzero) digits is 1458, while the sum is 26.

Adding to 31130313131231 its reverse (13213131303113), we get a palindrome (44343444434344).

The spelling of 31130313131231 in words is "thirty-one trillion, one hundred thirty billion, three hundred thirteen million, one hundred thirty-one thousand, two hundred thirty-one".