31705527842 has 8 divisors (see below), whose sum is σ = 47580552876. Its totient is φ = 15845343552.

The previous prime is 31705527787. The next prime is 31705527859. The reversal of 31705527842 is 24872550713.

It can be written as a sum of positive squares in 2 ways, for example, as 21042693721 + 10662834121 = 145061^2 + 103261^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 31705527793 and 31705527802.

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, 3704843 + ... + 3713390.

Almost surely, 2^31705527842 is an apocalyptic number.

31705527842 is a deficient number, since it is larger than the sum of its proper divisors (15875025034).

31705527842 is a wasteful number, since it uses less digits than its factorization.

31705527842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7420372.

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 31705527842 in words is "thirty-one billion, seven hundred five million, five hundred twenty-seven thousand, eight hundred forty-two".