31302130113 has 48 divisors (see below), whose sum is σ = 47318066640. Its totient is φ = 19914854400.

The previous prime is 31302130109. The next prime is 31302130147. The reversal of 31302130113 is 31103120313.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 23573610369 + 7728519744 = 153537^2 + 87912^2 .

It is not a de Polignac number, because 31302130113 - 2² = 31302130109 is a prime.

It is a super-2 number, since 2×31302130113² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31302130213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12415293 + ... + 12417813.

It is an arithmetic number, because the mean of its divisors is an integer number (985793055).

Almost surely, 2^31302130113 is an apocalyptic number.

It is an amenable number.

31302130113 is a deficient number, since it is larger than the sum of its proper divisors (16015936527).

31302130113 is a wasteful number, since it uses less digits than its factorization.

31302130113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3090 (or 3087 counting only the distinct ones).

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

Adding to 31302130113 its reverse (31103120313), we get a palindrome (62405250426).

The spelling of 31302130113 in words is "thirty-one billion, three hundred two million, one hundred thirty thousand, one hundred thirteen".