31032112019 has 4 divisors (see below), whose sum is σ = 31171269696. Its totient is φ = 30892954344.

The previous prime is 31032112009. The next prime is 31032112037. The reversal of 31032112019 is 91021123013.

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

It is a cyclic number.

It is not a de Polignac number, because 31032112019 - 2²⁰ = 31031063443 is a prime.

It is a super-2 number, since 2×31032112019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31032111985 and 31032112003.

It is not an unprimeable number, because it can be changed into a prime (31032112009) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 69578504 + ... + 69578949.

It is an arithmetic number, because the mean of its divisors is an integer number (7792817424).

Almost surely, 2^31032112019 is an apocalyptic number.

31032112019 is a deficient number, since it is larger than the sum of its proper divisors (139157677).

31032112019 is a wasteful number, since it uses less digits than its factorization.

31032112019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139157676.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 31032112019 in words is "thirty-one billion, thirty-two million, one hundred twelve thousand, nineteen".