31031130132 has 168 divisors, whose sum is σ = 87504915456. Its totient is φ = 9588927744.

The previous prime is 31031130131. The next prime is 31031130139. The reversal of 31031130132 is 23103113013.

It is a happy number.

31031130132 is a `hidden beast` number, since 310 + 311 + 30 + 13 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031130131) 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 55 ways as a sum of consecutive naturals, for example, 3316653 + ... + 3325995.

It is an arithmetic number, because the mean of its divisors is an integer number (520862592).

Almost surely, 2^31031130132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31031130132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43752457728).

31031130132 is an abundant number, since it is smaller than the sum of its proper divisors (56473785324).

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

31031130132 is a wasteful number, since it uses less digits than its factorization.

31031130132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9449 (or 9432 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31031130132 its reverse (23103113013), we get a palindrome (54134243145).

It can be divided in two parts, 3103113013 and 2, that multiplied together give a palindrome (6206226026).

The spelling of 31031130132 in words is "thirty-one billion, thirty-one million, one hundred thirty thousand, one hundred thirty-two".