31405143324 has 72 divisors (see below), whose sum is σ = 77905891840. Its totient is φ = 9844602624.

The previous prime is 31405143317. The next prime is 31405143349. The reversal of 31405143324 is 42334150413.

It is a junction number, because it is equal to n+sod(n) for n = 31405143291 and 31405143300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5431467 + ... + 5437245.

Almost surely, 2^31405143324 is an apocalyptic number.

31405143324 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31405143324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38952945920).

31405143324 is an abundant number, since it is smaller than the sum of its proper divisors (46500748516).

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

31405143324 is a wasteful number, since it uses less digits than its factorization.

31405143324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7387 (or 7368 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 31405143324 its reverse (42334150413), we get a palindrome (73739293737).

The spelling of 31405143324 in words is "thirty-one billion, four hundred five million, one hundred forty-three thousand, three hundred twenty-four".