31313201332 has 48 divisors (see below), whose sum is σ = 66034362240. Its totient is φ = 12692063232.

The previous prime is 31313201279. The next prime is 31313201333. The reversal of 31313201332 is 23310231313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313201333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265848 + ... + 365104.

It is an arithmetic number, because the mean of its divisors is an integer number (1375715880).

Almost surely, 2^31313201332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31313201332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33017181120).

31313201332 is an abundant number, since it is smaller than the sum of its proper divisors (34721160908).

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

31313201332 is a wasteful number, since it uses less digits than its factorization.

31313201332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99880 (or 99878 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31313201332 its reverse (23310231313), we get a palindrome (54623432645).

The spelling of 31313201332 in words is "thirty-one billion, three hundred thirteen million, two hundred one thousand, three hundred thirty-two".