31032123019 has 4 divisors (see below), whose sum is σ = 31131267496. Its totient is φ = 30932978544.

The previous prime is 31032123013. The next prime is 31032123047. The reversal of 31032123019 is 91032123013.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31032123019 is a prime.

It is a super-2 number, since 2×31032123019² (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 = 31032122984 and 31032123002.

It is not an unprimeable number, because it can be changed into a prime (31032123013) 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, 49571769 + ... + 49572394.

It is an arithmetic number, because the mean of its divisors is an integer number (7782816874).

Almost surely, 2^31032123019 is an apocalyptic number.

31032123019 is a deficient number, since it is larger than the sum of its proper divisors (99144477).

31032123019 is an equidigital number, since it uses as much as digits as its factorization.

31032123019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99144476.

The product of its (nonzero) digits is 972, while the sum is 25.

The spelling of 31032123019 in words is "thirty-one billion, thirty-two million, one hundred twenty-three thousand, nineteen".