31715631849 has 32 divisors (see below), whose sum is σ = 46363000320. Its totient is φ = 19125440000.

The previous prime is 31715631811. The next prime is 31715631853. The reversal of 31715631849 is 94813651713.

It is a cyclic number.

It is not a de Polignac number, because 31715631849 - 2¹⁵ = 31715599081 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31715631798 and 31715631807.

It is not an unprimeable number, because it can be changed into a prime (31715631809) 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 31 ways as a sum of consecutive naturals, for example, 15645574 + ... + 15647600.

It is an arithmetic number, because the mean of its divisors is an integer number (1448843760).

Almost surely, 2^31715631849 is an apocalyptic number.

It is an amenable number.

31715631849 is a deficient number, since it is larger than the sum of its proper divisors (14647368471).

31715631849 is a wasteful number, since it uses less digits than its factorization.

31715631849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4181.

The product of its digits is 544320, while the sum is 48.

The spelling of 31715631849 in words is "thirty-one billion, seven hundred fifteen million, six hundred thirty-one thousand, eight hundred forty-nine".