31123230312 has 32 divisors (see below), whose sum is σ = 77821742880. Its totient is φ = 10372587840.

The previous prime is 31123230293. The next prime is 31123230317. The reversal of 31123230312 is 21303232113.

It is not an unprimeable number, because it can be changed into a prime (31123230317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29262 + ... + 251202.

It is an arithmetic number, because the mean of its divisors is an integer number (2431929465).

Almost surely, 2^31123230312 is an apocalyptic number.

It is an amenable number.

31123230312 is an abundant number, since it is smaller than the sum of its proper divisors (46698512568).

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

31123230312 is a wasteful number, since it uses less digits than its factorization.

31123230312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227793 (or 227789 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31123230312 its reverse (21303232113), we get a palindrome (52426462425).

The spelling of 31123230312 in words is "thirty-one billion, one hundred twenty-three million, two hundred thirty thousand, three hundred twelve".