31130113 has 24 divisors (see below), whose sum is σ = 38234112. Its totient is φ = 24820992.

The previous prime is 31130101. The next prime is 31130147. The reversal of 31130113 is 31103113.

It is a happy number.

It is not a de Polignac number, because 31130113 - 2⁵ = 31130081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31130093 and 31130102.

It is not an unprimeable number, because it can be changed into a prime (31130513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 245056 + ... + 245182.

It is an arithmetic number, because the mean of its divisors is an integer number (1593088).

Almost surely, 2^31130113 is an apocalyptic number.

It is an amenable number.

31130113 is a deficient number, since it is larger than the sum of its proper divisors (7103999).

31130113 is a wasteful number, since it uses less digits than its factorization.

31130113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 31130113 is about 5579.4366203050. The cubic root of 31130113 is about 314.5769512011.

Adding to 31130113 its reverse (31103113), we get a palindrome (62233226).

Subtracting from 31130113 its reverse (31103113), we obtain a cube (27000 = 30³).

The spelling of 31130113 in words is "thirty-one million, one hundred thirty thousand, one hundred thirteen".