31871879331 has 16 divisors (see below), whose sum is σ = 42563757984. Its totient is φ = 21213990144.

The previous prime is 31871879321. The next prime is 31871879353. The reversal of 31871879331 is 13397817813.

It is not a de Polignac number, because 31871879331 - 2¹³ = 31871871139 is a prime.

It is a super-2 number, since 2×31871879331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31871879321) 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 15 ways as a sum of consecutive naturals, for example, 8666065 + ... + 8669741.

It is an arithmetic number, because the mean of its divisors is an integer number (2660234874).

Almost surely, 2^31871879331 is an apocalyptic number.

31871879331 is a deficient number, since it is larger than the sum of its proper divisors (10691878653).

31871879331 is a wasteful number, since it uses less digits than its factorization.

31871879331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7510.

The product of its digits is 762048, while the sum is 51.

The spelling of 31871879331 in words is "thirty-one billion, eight hundred seventy-one million, eight hundred seventy-nine thousand, three hundred thirty-one".