31401340321332 has 48 divisors (see below), whose sum is σ = 74379731110272. Its totient is φ = 10308860405760.

The previous prime is 31401340321327. The next prime is 31401340321339. The reversal of 31401340321332 is 23312304310413.

It is a super-2 number, since 2×31401340321332² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31401340321332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31401340321339) 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, 18524893 + ... + 20148804.

It is an arithmetic number, because the mean of its divisors is an integer number (1549577731464).

Almost surely, 2^{31401340321332} is an apocalyptic number.

It is an amenable number.

31401340321332 is an abundant number, since it is smaller than the sum of its proper divisors (42978390788940).

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

31401340321332 is a wasteful number, since it uses less digits than its factorization.

31401340321332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38674728 (or 38674726 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 31401340321332 its reverse (23312304310413), we get a palindrome (54713644631745).

The spelling of 31401340321332 in words is "thirty-one trillion, four hundred one billion, three hundred forty million, three hundred twenty-one thousand, three hundred thirty-two".