631152171 has 12 divisors (see below), whose sum is σ = 981792448. Its totient is φ = 388401264.

The previous prime is 631152163. The next prime is 631152199. The reversal of 631152171 is 171251136.

631152171 is a `hidden beast` number, since 63 + 11 + 521 + 71 = 666.

It is not a de Polignac number, because 631152171 - 2³ = 631152163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631152101) 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, 2697115 + ... + 2697348.

Almost surely, 2^631152171 is an apocalyptic number.

631152171 is a deficient number, since it is larger than the sum of its proper divisors (350640277).

631152171 is a wasteful number, since it uses less digits than its factorization.

631152171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5394482 (or 5394479 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 631152171 is about 25122.7421075009. The cubic root of 631152171 is about 857.7841690644.

The spelling of 631152171 in words is "six hundred thirty-one million, one hundred fifty-two thousand, one hundred seventy-one".