31332111312 has 40 divisors (see below), whose sum is σ = 81393495840. Its totient is φ = 10385687680.

The previous prime is 31332111281. The next prime is 31332111319. The reversal of 31332111312 is 21311123313.

It is a happy number.

It is a super-2 number, since 2×31332111312² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31332111319) 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, 1814739 + ... + 1831922.

It is an arithmetic number, because the mean of its divisors is an integer number (2034837396).

Almost surely, 2^31332111312 is an apocalyptic number.

It is an amenable number.

31332111312 is an abundant number, since it is smaller than the sum of its proper divisors (50061384528).

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

31332111312 is a wasteful number, since it uses less digits than its factorization.

31332111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646851 (or 3646845 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 31332111312 its reverse (21311123313), we get a palindrome (52643234625).

The spelling of 31332111312 in words is "thirty-one billion, three hundred thirty-two million, one hundred eleven thousand, three hundred twelve".