31144430132 has 6 divisors (see below), whose sum is σ = 54502752738. Its totient is φ = 15572215064.

The previous prime is 31144430131. The next prime is 31144430171. The reversal of 31144430132 is 23103444113.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20780375716 + 10364054416 = 144154^2 + 101804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144430131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3893053763 + ... + 3893053770.

It is an arithmetic number, because the mean of its divisors is an integer number (9083792123).

Almost surely, 2^31144430132 is an apocalyptic number.

It is an amenable number.

31144430132 is a deficient number, since it is larger than the sum of its proper divisors (23358322606).

31144430132 is a wasteful number, since it uses less digits than its factorization.

31144430132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7786107537 (or 7786107535 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 31144430132 its reverse (23103444113), we get a palindrome (54247874245).

The spelling of 31144430132 in words is "thirty-one billion, one hundred forty-four million, four hundred thirty thousand, one hundred thirty-two".