31642232144 has 20 divisors (see below), whose sum is σ = 62463558996. Its totient is φ = 15522604032.

The previous prime is 31642232123. The next prime is 31642232147. The reversal of 31642232144 is 44123224613.

It can be written as a sum of positive squares in 2 ways, for example, as 20061889600 + 11580342544 = 141640^2 + 107612^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31642232144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31642232147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18656129 + ... + 18657824.

Almost surely, 2^31642232144 is an apocalyptic number.

It is an amenable number.

31642232144 is a deficient number, since it is larger than the sum of its proper divisors (30821326852).

31642232144 is a wasteful number, since it uses less digits than its factorization.

31642232144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37314014 (or 37314008 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

Adding to 31642232144 its reverse (44123224613), we get a palindrome (75765456757).

The spelling of 31642232144 in words is "thirty-one billion, six hundred forty-two million, two hundred thirty-two thousand, one hundred forty-four".