31120008193 has 4 divisors (see below), whose sum is σ = 31428127188. Its totient is φ = 30811889200.

The previous prime is 31120008191. The next prime is 31120008233. The reversal of 31120008193 is 39180002113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13101778369 + 18018229824 = 114463^2 + 134232^2 .

It is a cyclic number.

It is not a de Polignac number, because 31120008193 - 2¹ = 31120008191 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31120008191) by changing a digit.

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, 154059346 + ... + 154059547.

It is an arithmetic number, because the mean of its divisors is an integer number (7857031797).

Almost surely, 2^31120008193 is an apocalyptic number.

It is an amenable number.

31120008193 is a deficient number, since it is larger than the sum of its proper divisors (308118995).

31120008193 is a wasteful number, since it uses less digits than its factorization.

31120008193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308118994.

The product of its (nonzero) digits is 1296, while the sum is 28.

The spelling of 31120008193 in words is "thirty-one billion, one hundred twenty million, eight thousand, one hundred ninety-three".