3131123313340 has 48 divisors (see below), whose sum is σ = 7550651445120. Its totient is φ = 1078664489280.

The previous prime is 3131123313317. The next prime is 3131123313343. The reversal of 3131123313340 is 433133211313.

It is a junction number, because it is equal to n+sod(n) for n = 3131123313299 and 3131123313308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131123313343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374532102 + ... + 374540461.

It is an arithmetic number, because the mean of its divisors is an integer number (157305238440).

Almost surely, 2^{3131123313340} is an apocalyptic number.

It is an amenable number.

3131123313340 is an abundant number, since it is smaller than the sum of its proper divisors (4419528131780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3131123313340 is a wasteful number, since it uses less digits than its factorization.

3131123313340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749072602 (or 749072600 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 3131123313340 its reverse (433133211313), we get a palindrome (3564256524653).

The spelling of 3131123313340 in words is "three trillion, one hundred thirty-one billion, one hundred twenty-three million, three hundred thirteen thousand, three hundred forty".