31513101112 has 8 divisors (see below), whose sum is σ = 59087064600. Its totient is φ = 15756550552.

The previous prime is 31513101091. The next prime is 31513101121. The reversal of 31513101112 is 21110131513.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 31513101112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1969568812 + ... + 1969568827.

It is an arithmetic number, because the mean of its divisors is an integer number (7385883075).

Almost surely, 2^31513101112 is an apocalyptic number.

It is an amenable number.

31513101112 is a deficient number, since it is larger than the sum of its proper divisors (27573963488).

31513101112 is a wasteful number, since it uses less digits than its factorization.

31513101112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3939137645 (or 3939137641 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 19.

Adding to 31513101112 its reverse (21110131513), we get a palindrome (52623232625).

The spelling of 31513101112 in words is "thirty-one billion, five hundred thirteen million, one hundred one thousand, one hundred twelve".