31271433426 has 32 divisors (see below), whose sum is σ = 69508857600. Its totient is φ = 10421293680.

The previous prime is 31271433383. The next prime is 31271433433. The reversal of 31271433426 is 62433417213.

31271433426 is a `hidden beast` number, since 3 + 1 + 271 + 43 + 342 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

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, 162840 + ... + 298428.

It is an arithmetic number, because the mean of its divisors is an integer number (2172151800).

Almost surely, 2^31271433426 is an apocalyptic number.

31271433426 is an abundant number, since it is smaller than the sum of its proper divisors (38237424174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31271433426 is a wasteful number, since it uses less digits than its factorization.

31271433426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139871 (or 139865 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The spelling of 31271433426 in words is "thirty-one billion, two hundred seventy-one million, four hundred thirty-three thousand, four hundred twenty-six".