231131313232 has 10 divisors (see below), whose sum is σ = 447816919418. Its totient is φ = 115565656608.

The previous prime is 231131313227. The next prime is 231131313241. The reversal of 231131313232 is 232313131132.

It can be written as a sum of positive squares in only one way, i.e., 138506042896 + 92625270336 = 372164^2 + 304344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231131313197 and 231131313206.

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, 7222853523 + ... + 7222853554.

Almost surely, 2^231131313232 is an apocalyptic number.

It is an amenable number.

231131313232 is a deficient number, since it is larger than the sum of its proper divisors (216685606186).

231131313232 is a wasteful number, since it uses less digits than its factorization.

231131313232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14445707085 (or 14445707079 counting only the distinct ones).

The product of its digits is 1944, while the sum is 25.

Adding to 231131313232 its reverse (232313131132), we get a palindrome (463444444364).

The spelling of 231131313232 in words is "two hundred thirty-one billion, one hundred thirty-one million, three hundred thirteen thousand, two hundred thirty-two".