31303211323132 has 96 divisors (see below), whose sum is σ = 65010931171200. Its totient is φ = 12903936933888.

The previous prime is 31303211323127. The next prime is 31303211323207. The reversal of 31303211323132 is 23132311230313.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 31303211323132.

It is a congruent number.

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, 1801407628 + ... + 1801425004.

It is an arithmetic number, because the mean of its divisors is an integer number (677197199700).

Almost surely, 2^{31303211323132} 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 31303211323132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32505465585600).

31303211323132 is an abundant number, since it is smaller than the sum of its proper divisors (33707719848068).

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

31303211323132 is a wasteful number, since it uses less digits than its factorization.

31303211323132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25703 (or 25701 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31303211323132 its reverse (23132311230313), we get a palindrome (54435522553445).

The spelling of 31303211323132 in words is "thirty-one trillion, three hundred three billion, two hundred eleven million, three hundred twenty-three thousand, one hundred thirty-two".