31404132143440 has 160 divisors (see below), whose sum is σ = 84992035518720. Its totient is φ = 10568117452800.

The previous prime is 31404132143389. The next prime is 31404132143509. The reversal of 31404132143440 is 4434123140413.

It is a junction number, because it is equal to n+sod(n) for n = 31404132143396 and 31404132143405.

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, 20437230 + ... + 21920050.

It is an arithmetic number, because the mean of its divisors is an integer number (531200221992).

Almost surely, 2^{31404132143440} 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 31404132143440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42496017759360).

31404132143440 is an abundant number, since it is smaller than the sum of its proper divisors (53587903375280).

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

31404132143440 is a wasteful number, since it uses less digits than its factorization.

31404132143440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483541 (or 1483535 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

Adding to 31404132143440 its reverse (4434123140413), we get a palindrome (35838255283853).

The spelling of 31404132143440 in words is "thirty-one trillion, four hundred four billion, one hundred thirty-two million, one hundred forty-three thousand, four hundred forty".