631151 has 2 divisors, whose sum is σ = 631152. Its totient is φ = 631150.

The previous prime is 631139. The next prime is 631153. The reversal of 631151 is 151136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631151 - 2¹⁰ = 630127 is a prime.

Together with 631153, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₅₁₄₁₆ and since 631151 and 51416 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631153) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315575 + 315576.

It is an arithmetic number, because the mean of its divisors is an integer number (315576).

2⁶³¹¹⁵¹ is an apocalyptic number.

631151 is a deficient number, since it is larger than the sum of its proper divisors (1).

631151 is an equidigital number, since it uses as much as digits as its factorization.

631151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90, while the sum is 17.

The square root of 631151 is about 794.4501242998. The cubic root of 631151 is about 85.7783638571.

Adding to 631151 its reverse (151136), we get a palindrome (782287).

The spelling of 631151 in words is "six hundred thirty-one thousand, one hundred fifty-one".