31323130031 has 16 divisors (see below), whose sum is σ = 32186419200. Its totient is φ = 30471553728.

The previous prime is 31323129979. The next prime is 31323130073. The reversal of 31323130031 is 13003132313.

It is a cyclic number.

It is not a de Polignac number, because 31323130031 - 2⁶ = 31323129967 is a prime.

It is a super-2 number, since 2×31323130031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31323129985 and 31323130012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323130331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7529330 + ... + 7533488.

It is an arithmetic number, because the mean of its divisors is an integer number (2011651200).

Almost surely, 2^31323130031 is an apocalyptic number.

31323130031 is a deficient number, since it is larger than the sum of its proper divisors (863289169).

31323130031 is a wasteful number, since it uses less digits than its factorization.

31323130031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5518.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31323130031 its reverse (13003132313), we get a palindrome (44326262344).

The spelling of 31323130031 in words is "thirty-one billion, three hundred twenty-three million, one hundred thirty thousand, thirty-one".