31135144132 has 12 divisors (see below), whose sum is σ = 54519798060. Its totient is φ = 15558058976.

The previous prime is 31135144129. The next prime is 31135144133. The reversal of 31135144132 is 23144153113.

It can be written as a sum of positive squares in 2 ways, for example, as 2757720196 + 28377423936 = 52514^2 + 168456^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31135144132.

It is not an unprimeable number, because it can be changed into a prime (31135144133) 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 3 ways as a sum of consecutive naturals, for example, 2370907 + ... + 2384002.

It is an arithmetic number, because the mean of its divisors is an integer number (4543316505).

Almost surely, 2^31135144132 is an apocalyptic number.

It is an amenable number.

31135144132 is a deficient number, since it is larger than the sum of its proper divisors (23384653928).

31135144132 is a wasteful number, since it uses less digits than its factorization.

31135144132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756550 (or 4756548 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

Adding to 31135144132 its reverse (23144153113), we get a palindrome (54279297245).

The spelling of 31135144132 in words is "thirty-one billion, one hundred thirty-five million, one hundred forty-four thousand, one hundred thirty-two".