31332213312 has 224 divisors, whose sum is σ = 89681133312. Its totient is φ = 9628286976.

The previous prime is 31332213293. The next prime is 31332213347. The reversal of 31332213312 is 21331223313.

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 31 ways as a sum of consecutive naturals, for example, 18462448 + ... + 18464144.

Almost surely, 2^31332213312 is an apocalyptic number.

31332213312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31332213312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44840566656).

31332213312 is an abundant number, since it is smaller than the sum of its proper divisors (58348920000).

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

31332213312 is a wasteful number, since it uses less digits than its factorization.

31332213312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885 (or 1875 counting only the distinct ones).

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

Adding to 31332213312 its reverse (21331223313), we get a palindrome (52663436625).

The spelling of 31332213312 in words is "thirty-one billion, three hundred thirty-two million, two hundred thirteen thousand, three hundred twelve".