31332321312 has 48 divisors (see below), whose sum is σ = 82588679712. Its totient is φ = 10400762880.

The previous prime is 31332321289. The next prime is 31332321323. The reversal of 31332321312 is 21312323313.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653998 + ... + 700269.

It is an arithmetic number, because the mean of its divisors is an integer number (1720597494).

Almost surely, 2^31332321312 is an apocalyptic number.

31332321312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31332321312 is an abundant number, since it is smaller than the sum of its proper divisors (51256358400).

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

31332321312 is a wasteful number, since it uses less digits than its factorization.

31332321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1354521 (or 1354513 counting only the distinct ones).

The product of its digits is 1944, while the sum is 24.

Adding to 31332321312 its reverse (21312323313), we get a palindrome (52644644625).

The spelling of 31332321312 in words is "thirty-one billion, three hundred thirty-two million, three hundred twenty-one thousand, three hundred twelve".