31440341224420 has 24 divisors (see below), whose sum is σ = 66026754287424. Its totient is φ = 12575748353376.

The previous prime is 31440341224387. The next prime is 31440341224471. The reversal of 31440341224420 is 2442214304413.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23593854 + ... + 24890773.

It is an arithmetic number, because the mean of its divisors is an integer number (2751114761976).

Almost surely, 2^{31440341224420} is an apocalyptic number.

It is an amenable number.

31440341224420 is an abundant number, since it is smaller than the sum of its proper divisors (34586413063004).

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

31440341224420 is a wasteful number, since it uses less digits than its factorization.

31440341224420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48517059 (or 48517057 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 31440341224420 its reverse (2442214304413), we get a palindrome (33882555528833).

The spelling of 31440341224420 in words is "thirty-one trillion, four hundred forty billion, three hundred forty-one million, two hundred twenty-four thousand, four hundred twenty".