31321233232 has 10 divisors (see below), whose sum is σ = 60684889418. Its totient is φ = 15660616608.

The previous prime is 31321233193. The next prime is 31321233287. The reversal of 31321233232 is 23233212313.

It can be written as a sum of positive squares in only one way, i.e., 28236097296 + 3085135936 = 168036^2 + 55544^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31321233197 and 31321233206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978788523 + ... + 978788554.

Almost surely, 2^31321233232 is an apocalyptic number.

It is an amenable number.

31321233232 is a deficient number, since it is larger than the sum of its proper divisors (29363656186).

31321233232 is a wasteful number, since it uses less digits than its factorization.

31321233232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957577085 (or 1957577079 counting only the distinct ones).

The product of its digits is 3888, while the sum is 25.

Adding to 31321233232 its reverse (23233212313), we get a palindrome (54554445545).

The spelling of 31321233232 in words is "thirty-one billion, three hundred twenty-one million, two hundred thirty-three thousand, two hundred thirty-two".