31231015232 has 14 divisors (see below), whose sum is σ = 61974045978. Its totient is φ = 15615507584.

The previous prime is 31231015199. The next prime is 31231015351. The reversal of 31231015232 is 23251013213.

It can be written as a sum of positive squares in only one way, i.e., 28326236416 + 2904778816 = 168304^2 + 53896^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31231015198 and 31231015207.

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, 243992243 + ... + 243992370.

Almost surely, 2^31231015232 is an apocalyptic number.

31231015232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31231015232 is a deficient number, since it is larger than the sum of its proper divisors (30743030746).

31231015232 is an equidigital number, since it uses as much as digits as its factorization.

31231015232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487984625 (or 487984615 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 31231015232 its reverse (23251013213), we get a palindrome (54482028445).

The spelling of 31231015232 in words is "thirty-one billion, two hundred thirty-one million, fifteen thousand, two hundred thirty-two".