31031321230 has 48 divisors (see below), whose sum is σ = 69973938720. Its totient is φ = 9820899648.

The previous prime is 31031321197. The next prime is 31031321239. The reversal of 31031321230 is 3212313013.

It is a junction number, because it is equal to n+sod(n) for n = 31031321198 and 31031321207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031321239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2429370 + ... + 2442109.

It is an arithmetic number, because the mean of its divisors is an integer number (1457790390).

Almost surely, 2^31031321230 is an apocalyptic number.

31031321230 is an abundant number, since it is smaller than the sum of its proper divisors (38942617490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31031321230 is a wasteful number, since it uses less digits than its factorization.

31031321230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871513 (or 4871506 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31031321230 its reverse (3212313013), we get a palindrome (34243634243).

The spelling of 31031321230 in words is "thirty-one billion, thirty-one million, three hundred twenty-one thousand, two hundred thirty".