31031123 has 12 divisors (see below), whose sum is σ = 33599160. Its totient is φ = 28579392.

The previous prime is 31031083. The next prime is 31031201. The reversal of 31031123 is 32113013.

It is not a de Polignac number, because 31031123 - 2²² = 26836819 is a prime.

It is a super-2 number, since 2×31031123² = 1925861189282258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31031098 and 31031107.

It is not an unprimeable number, because it can be changed into a prime (31031323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25415 + ... + 26607.

It is an arithmetic number, because the mean of its divisors is an integer number (2799930).

Almost surely, 2^31031123 is an apocalyptic number.

31031123 is a deficient number, since it is larger than the sum of its proper divisors (2568037).

31031123 is a wasteful number, since it uses less digits than its factorization.

31031123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1249 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 31031123 is about 5570.5585895851. The cubic root of 31031123 is about 314.2431582383.

Adding to 31031123 its reverse (32113013), we get a palindrome (63144136).

The spelling of 31031123 in words is "thirty-one million, thirty-one thousand, one hundred twenty-three".