31530240165105 has 96 divisors (see below), whose sum is σ = 61546927583232. Its totient is φ = 14793560668800.

The previous prime is 31530240165077. The next prime is 31530240165131. The reversal of 31530240165105 is 50156104203513.

31530240165105 is a `hidden beast` number, since 3 + 1 + 530 + 2 + 4 + 0 + 16 + 5 + 105 = 666.

It is not a de Polignac number, because 31530240165105 - 2⁷ = 31530240164977 is a prime.

It is a super-2 number, since 2×31530240165105² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31530240165105.

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 95 ways as a sum of consecutive naturals, for example, 503944554 + ... + 504007116.

It is an arithmetic number, because the mean of its divisors is an integer number (641113828992).

Almost surely, 2^{31530240165105} is an apocalyptic number.

It is an amenable number.

31530240165105 is a deficient number, since it is larger than the sum of its proper divisors (30016687418127).

31530240165105 is a wasteful number, since it uses less digits than its factorization.

31530240165105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95459 (or 95456 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 31530240165105 its reverse (50156104203513), we get a palindrome (81686344368618).

The spelling of 31530240165105 in words is "thirty-one trillion, five hundred thirty billion, two hundred forty million, one hundred sixty-five thousand, one hundred five".