31031020232 has 32 divisors (see below), whose sum is σ = 59732973720. Its totient is φ = 15103887360.

The previous prime is 31031020217. The next prime is 31031020247. The reversal of 31031020232 is 23202013013.

It is an interprime number because it is at equal distance from previous prime (31031020217) and next prime (31031020247).

It can be written as a sum of positive squares in 4 ways, for example, as 20470169476 + 10560850756 = 143074^2 + 102766^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31031020232.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46388 + ... + 253404.

Almost surely, 2^31031020232 is an apocalyptic number.

It is an amenable number.

31031020232 is a deficient number, since it is larger than the sum of its proper divisors (28701953488).

31031020232 is a wasteful number, since it uses less digits than its factorization.

31031020232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207521 (or 207517 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31031020232 its reverse (23202013013), we get a palindrome (54233033245).

The spelling of 31031020232 in words is "thirty-one billion, thirty-one million, twenty thousand, two hundred thirty-two".