31523338139 has 8 divisors (see below), whose sum is σ = 31768907280. Its totient is φ = 31277844000.

The previous prime is 31523338117. The next prime is 31523338199. The reversal of 31523338139 is 93183332513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31523338139 - 2²⁰ = 31522289563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31523338096 and 31523338105.

It is not an unprimeable number, because it can be changed into a prime (31523338199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1068689 + ... + 1097789.

It is an arithmetic number, because the mean of its divisors is an integer number (3971113410).

Almost surely, 2^31523338139 is an apocalyptic number.

31523338139 is a deficient number, since it is larger than the sum of its proper divisors (245569141).

31523338139 is a wasteful number, since it uses less digits than its factorization.

31523338139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37501.

The product of its digits is 174960, while the sum is 41.

The spelling of 31523338139 in words is "thirty-one billion, five hundred twenty-three million, three hundred thirty-eight thousand, one hundred thirty-nine".