31144004121320 has 32 divisors (see below), whose sum is σ = 71564945644800. Its totient is φ = 12192546293568.

The previous prime is 31144004121277. The next prime is 31144004121383. The reversal of 31144004121320 is 2312140044113.

It is a self number, because there is not a number n which added to its sum of digits gives 31144004121320.

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, 8282977940 + ... + 8282981699.

It is an arithmetic number, because the mean of its divisors is an integer number (2236404551400).

Almost surely, 2^{31144004121320} is an apocalyptic number.

It is an amenable number.

31144004121320 is an abundant number, since it is smaller than the sum of its proper divisors (40420941523480).

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

31144004121320 is a wasteful number, since it uses less digits than its factorization.

31144004121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16565959697 (or 16565959693 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 31144004121320 its reverse (2312140044113), we get a palindrome (33456144165433).

The spelling of 31144004121320 in words is "thirty-one trillion, one hundred forty-four billion, four million, one hundred twenty-one thousand, three hundred twenty".