631271 has 2 divisors, whose sum is σ = 631272. Its totient is φ = 631270.

The previous prime is 631259. The next prime is 631273. The reversal of 631271 is 172136.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631271 - 2¹⁰ = 630247 is a prime.

It is a Sophie Germain prime.

Together with 631273, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315635 + 315636.

It is an arithmetic number, because the mean of its divisors is an integer number (315636).

2⁶³¹²⁷¹ is an apocalyptic number.

631271 is a deficient number, since it is larger than the sum of its proper divisors (1).

631271 is an equidigital number, since it uses as much as digits as its factorization.

631271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 20.

The square root of 631271 is about 794.5256446459. The cubic root of 631271 is about 85.7837998259.

The spelling of 631271 in words is "six hundred thirty-one thousand, two hundred seventy-one".