631183161 has 12 divisors (see below), whose sum is σ = 978978192. Its totient is φ = 360676008.

The previous prime is 631183159. The next prime is 631183169. The reversal of 631183161 is 161381136.

It is not a de Polignac number, because 631183161 - 2¹ = 631183159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631183169) 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 11 ways as a sum of consecutive naturals, for example, 2146735 + ... + 2147028.

It is an arithmetic number, because the mean of its divisors is an integer number (81581516).

Almost surely, 2^631183161 is an apocalyptic number.

It is an amenable number.

631183161 is a deficient number, since it is larger than the sum of its proper divisors (347795031).

631183161 is a wasteful number, since it uses less digits than its factorization.

631183161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293780 (or 4293773 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 631183161 is about 25123.3588717751. The cubic root of 631183161 is about 857.7982080963.

The spelling of 631183161 in words is "six hundred thirty-one million, one hundred eighty-three thousand, one hundred sixty-one".