3131311302 has 96 divisors (see below), whose sum is σ = 8425297920. Its totient is φ = 820212480.

The previous prime is 3131311219. The next prime is 3131311303. The reversal of 3131311302 is 2031131313.

It is a happy number.

It is a super-2 number, since 2×3131311302² = 19610220940065870408, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131311303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53118 + ... + 95310.

It is an arithmetic number, because the mean of its divisors is an integer number (87763520).

Almost surely, 2^3131311302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3131311302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4212648960).

3131311302 is an abundant number, since it is smaller than the sum of its proper divisors (5293986618).

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

3131311302 is a wasteful number, since it uses less digits than its factorization.

3131311302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42258 (or 42255 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 3131311302 is about 55958.1209655935. The cubic root of 3131311302 is about 1462.9924397381.

Adding to 3131311302 its reverse (2031131313), we get a palindrome (5162442615).

The spelling of 3131311302 in words is "three billion, one hundred thirty-one million, three hundred eleven thousand, three hundred two".