31742857172 has 12 divisors (see below), whose sum is σ = 59823077076. Its totient is φ = 14650549440.

The previous prime is 31742857169. The next prime is 31742857177. The reversal of 31742857172 is 27175824713.

It can be written as a sum of positive squares in 2 ways, for example, as 15988590916 + 15754266256 = 126446^2 + 125516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31742857177) 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 3 ways as a sum of consecutive naturals, for example, 305219729 + ... + 305219832.

It is an arithmetic number, because the mean of its divisors is an integer number (4985256423).

Almost surely, 2^31742857172 is an apocalyptic number.

It is an amenable number.

31742857172 is a deficient number, since it is larger than the sum of its proper divisors (28080219904).

31742857172 is a wasteful number, since it uses less digits than its factorization.

31742857172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610439578 (or 610439576 counting only the distinct ones).

The product of its digits is 658560, while the sum is 47.

The spelling of 31742857172 in words is "thirty-one billion, seven hundred forty-two million, eight hundred fifty-seven thousand, one hundred seventy-two".