31144231132 has 24 divisors (see below), whose sum is σ = 65952490464. Its totient is φ = 12562378752.

The previous prime is 31144231099. The next prime is 31144231133. The reversal of 31144231132 is 23113244113.

It is a junction number, because it is equal to n+sod(n) for n = 31144231097 and 31144231106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144231133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32714053 + ... + 32715004.

It is an arithmetic number, because the mean of its divisors is an integer number (2748020436).

Almost surely, 2^31144231132 is an apocalyptic number.

It is an amenable number.

31144231132 is an abundant number, since it is smaller than the sum of its proper divisors (34808259332).

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

31144231132 is a wasteful number, since it uses less digits than its factorization.

31144231132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65429085 (or 65429083 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

Adding to 31144231132 its reverse (23113244113), we get a palindrome (54257475245).

The spelling of 31144231132 in words is "thirty-one billion, one hundred forty-four million, two hundred thirty-one thousand, one hundred thirty-two".