31123113 has 8 divisors (see below), whose sum is σ = 47425728. Its totient is φ = 17784624.

The previous prime is 31123109. The next prime is 31123123. The reversal of 31123113 is 31132113.

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

It is not a de Polignac number, because 31123113 - 2² = 31123109 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31123092 and 31123101.

It is not an unprimeable number, because it can be changed into a prime (31123123) 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, 741006 + ... + 741047.

It is an arithmetic number, because the mean of its divisors is an integer number (5928216).

Almost surely, 2^31123113 is an apocalyptic number.

It is an amenable number.

31123113 is a deficient number, since it is larger than the sum of its proper divisors (16302615).

31123113 is a wasteful number, since it uses less digits than its factorization.

31123113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482063.

The product of its digits is 54, while the sum is 15.

The square root of 31123113 is about 5578.8092815582. The cubic root of 31123113 is about 314.5533705636.

Adding to 31123113 its reverse (31132113), we get a palindrome (62255226).

The spelling of 31123113 in words is "thirty-one million, one hundred twenty-three thousand, one hundred thirteen".