631131159 has 4 divisors (see below), whose sum is σ = 841508216. Its totient is φ = 420754104.

The previous prime is 631131157. The next prime is 631131169. The reversal of 631131159 is 951131136.

631131159 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 631131159 - 2¹ = 631131157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631131157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105188524 + ... + 105188529.

It is an arithmetic number, because the mean of its divisors is an integer number (210377054).

Almost surely, 2^631131159 is an apocalyptic number.

631131159 is a deficient number, since it is larger than the sum of its proper divisors (210377057).

631131159 is a wasteful number, since it uses less digits than its factorization.

631131159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210377056.

The product of its digits is 2430, while the sum is 30.

The square root of 631131159 is about 25122.3239171857. The cubic root of 631131159 is about 857.7746499860.

The spelling of 631131159 in words is "six hundred thirty-one million, one hundred thirty-one thousand, one hundred fifty-nine".