31771427139 has 24 divisors (see below), whose sum is σ = 45982808352. Its totient is φ = 21139123200.

The previous prime is 31771427111. The next prime is 31771427203. The reversal of 31771427139 is 93172417713.

It is not a de Polignac number, because 31771427139 - 2¹³ = 31771418947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31771427094 and 31771427103.

It is not an unprimeable number, because it can be changed into a prime (31771427339) 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 23 ways as a sum of consecutive naturals, for example, 19696297 + ... + 19697909.

It is an arithmetic number, because the mean of its divisors is an integer number (1915950348).

Almost surely, 2^31771427139 is an apocalyptic number.

31771427139 is a deficient number, since it is larger than the sum of its proper divisors (14211381213).

31771427139 is a wasteful number, since it uses less digits than its factorization.

31771427139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4587 (or 4584 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The spelling of 31771427139 in words is "thirty-one billion, seven hundred seventy-one million, four hundred twenty-seven thousand, one hundred thirty-nine".