31128583113 has 12 divisors (see below), whose sum is σ = 45920179968. Its totient is φ = 20310848280.

The previous prime is 31128583103. The next prime is 31128583117. The reversal of 31128583113 is 31138582113.

It is a happy number.

31128583113 is a `hidden beast` number, since 311 + 28 + 5 + 8 + 311 + 3 = 666.

It is not a de Polignac number, because 31128583113 - 2⁵ = 31128583081 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31128583117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36794593 + ... + 36795438.

It is an arithmetic number, because the mean of its divisors is an integer number (3826681664).

Almost surely, 2^31128583113 is an apocalyptic number.

It is an amenable number.

31128583113 is a deficient number, since it is larger than the sum of its proper divisors (14791596855).

31128583113 is a wasteful number, since it uses less digits than its factorization.

31128583113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73590084 (or 73590081 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The spelling of 31128583113 in words is "thirty-one billion, one hundred twenty-eight million, five hundred eighty-three thousand, one hundred thirteen".