31313442132 has 96 divisors (see below), whose sum is σ = 93371882240. Its totient is φ = 8889678720.

The previous prime is 31313442109. The next prime is 31313442163. The reversal of 31313442132 is 23124431313.

It is a happy number.

31313442132 is a `hidden beast` number, since 313 + 1 + 344 + 2 + 1 + 3 + 2 = 666.

It is a super-2 number, since 2×31313442132² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is a junction number, because it is equal to n+sod(n) for n = 31313442096 and 31313442105.

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, 13219 + ... + 250602.

Almost surely, 2^31313442132 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 31313442132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46685941120).

31313442132 is an abundant number, since it is smaller than the sum of its proper divisors (62058440108).

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

31313442132 is a wasteful number, since it uses less digits than its factorization.

31313442132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263998 (or 263990 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 31313442132 its reverse (23124431313), we get a palindrome (54437873445).

The spelling of 31313442132 in words is "thirty-one billion, three hundred thirteen million, four hundred forty-two thousand, one hundred thirty-two".