31405221002504 has 16 divisors (see below), whose sum is σ = 58889585913900. Its totient is φ = 15701331425472.

The previous prime is 31405221002497. The next prime is 31405221002513. The reversal of 31405221002504 is 40520012250413.

It can be written as a sum of positive squares in 2 ways, for example, as 30470422080004 + 934798922500 = 5520002^2 + 966850^2 .

It is a super-2 number, since 2×31405221002504² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159780119 + ... + 159976550.

Almost surely, 2^{31405221002504} is an apocalyptic number.

It is an amenable number.

31405221002504 is a deficient number, since it is larger than the sum of its proper divisors (27484364911396).

31405221002504 is a wasteful number, since it uses less digits than its factorization.

31405221002504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319768952 (or 319768948 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 31405221002504 its reverse (40520012250413), we get a palindrome (71925233252917).

The spelling of 31405221002504 in words is "thirty-one trillion, four hundred five billion, two hundred twenty-one million, two thousand, five hundred four".