31031131332 has 24 divisors (see below), whose sum is σ = 73772125056. Its totient is φ = 10148545888.

The previous prime is 31031131297. The next prime is 31031131337. The reversal of 31031131332 is 23313113013.

It is a super-2 number, since 2×31031131332² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31031131299 and 31031131308.

It is not an unprimeable number, because it can be changed into a prime (31031131337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24394908 + ... + 24396179.

It is an arithmetic number, because the mean of its divisors is an integer number (3073838544).

Almost surely, 2^31031131332 is an apocalyptic number.

It is an amenable number.

31031131332 is an abundant number, since it is smaller than the sum of its proper divisors (42740993724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31031131332 is a wasteful number, since it uses less digits than its factorization.

31031131332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48791147 (or 48791145 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31031131332 its reverse (23313113013), we get a palindrome (54344244345).

The spelling of 31031131332 in words is "thirty-one billion, thirty-one million, one hundred thirty-one thousand, three hundred thirty-two".