31440113420324 has 96 divisors (see below), whose sum is σ = 66909476874240. Its totient is φ = 12626973964800.

The previous prime is 31440113420323. The next prime is 31440113420327. The reversal of 31440113420324 is 42302431104413.

It is not an unprimeable number, because it can be changed into a prime (31440113420323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20948924 + ... + 22399500.

It is an arithmetic number, because the mean of its divisors is an integer number (696973717440).

Almost surely, 2^{31440113420324} 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 31440113420324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33454738437120).

31440113420324 is an abundant number, since it is smaller than the sum of its proper divisors (35469363453916).

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

31440113420324 is a wasteful number, since it uses less digits than its factorization.

31440113420324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451049 (or 1451047 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 31440113420324 its reverse (42302431104413), we get a palindrome (73742544524737).

The spelling of 31440113420324 in words is "thirty-one trillion, four hundred forty billion, one hundred thirteen million, four hundred twenty thousand, three hundred twenty-four".