31431709522 has 8 divisors (see below), whose sum is σ = 47166918156. Its totient is φ = 15709403472.

The previous prime is 31431709493. The next prime is 31431709549. The reversal of 31431709522 is 22590713413.

It can be written as a sum of positive squares in 2 ways, for example, as 24661875681 + 6769833841 = 157041^2 + 82279^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 3219553 + ... + 3229300.

Almost surely, 2^31431709522 is an apocalyptic number.

31431709522 is a deficient number, since it is larger than the sum of its proper divisors (15735208634).

31431709522 is a wasteful number, since it uses less digits than its factorization.

31431709522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6451292.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 31431709522 in words is "thirty-one billion, four hundred thirty-one million, seven hundred nine thousand, five hundred twenty-two".