631687151 has 2 divisors, whose sum is σ = 631687152. Its totient is φ = 631687150.

The previous prime is 631687141. The next prime is 631687153. The reversal of 631687151 is 151786136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631687151 - 2¹⁰ = 631686127 is a prime.

Together with 631687153, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_32890565 and since 631687151 and 32890565 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 (631687153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315843575 + 315843576.

It is an arithmetic number, because the mean of its divisors is an integer number (315843576).

Almost surely, 2^631687151 is an apocalyptic number.

631687151 is a deficient number, since it is larger than the sum of its proper divisors (1).

631687151 is an equidigital number, since it uses as much as digits as its factorization.

631687151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 38.

The square root of 631687151 is about 25133.3871772191. The cubic root of 631687151 is about 858.0264602262.

The spelling of 631687151 in words is "six hundred thirty-one million, six hundred eighty-seven thousand, one hundred fifty-one".