31415424144 has 320 divisors, whose sum is σ = 94727270400. Its totient is φ = 8890269696.

The previous prime is 31415424143. The next prime is 31415424167. The reversal of 31415424144 is 44142451413.

It is not an unprimeable number, because it can be changed into a prime (31415424143) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 67851657 + ... + 67852119.

It is an arithmetic number, because the mean of its divisors is an integer number (296022720).

Almost surely, 2^31415424144 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 31415424144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47363635200).

31415424144 is an abundant number, since it is smaller than the sum of its proper divisors (63311846256).

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

31415424144 is a wasteful number, since it uses less digits than its factorization.

31415424144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 656 counting only the distinct ones).

The product of its digits is 30720, while the sum is 33.

Adding to 31415424144 its reverse (44142451413), we get a palindrome (75557875557).

The spelling of 31415424144 in words is "thirty-one billion, four hundred fifteen million, four hundred twenty-four thousand, one hundred forty-four".