31513105345 has 32 divisors (see below), whose sum is σ = 41770080000. Its totient is φ = 22741281024.

The previous prime is 31513105289. The next prime is 31513105369. The reversal of 31513105345 is 54350131513.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31513105345 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33531 + ... + 253279.

It is an arithmetic number, because the mean of its divisors is an integer number (1305315000).

Almost surely, 2^31513105345 is an apocalyptic number.

It is an amenable number.

31513105345 is a deficient number, since it is larger than the sum of its proper divisors (10256974655).

31513105345 is a wasteful number, since it uses less digits than its factorization.

31513105345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219849.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 31513105345 its reverse (54350131513), we get a palindrome (85863236858).

The spelling of 31513105345 in words is "thirty-one billion, five hundred thirteen million, one hundred five thousand, three hundred forty-five".