631171641 has 16 divisors (see below), whose sum is σ = 866544704. Its totient is φ = 408348864.

The previous prime is 631171637. The next prime is 631171661. The reversal of 631171641 is 146171136.

It is not a de Polignac number, because 631171641 - 2² = 631171637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 631171599 and 631171608.

It is not an unprimeable number, because it can be changed into a prime (631171661) 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 15 ways as a sum of consecutive naturals, for example, 36906 + ... + 51228.

It is an arithmetic number, because the mean of its divisors is an integer number (54159044).

Almost surely, 2^631171641 is an apocalyptic number.

It is an amenable number.

631171641 is a deficient number, since it is larger than the sum of its proper divisors (235373063).

631171641 is a wasteful number, since it uses less digits than its factorization.

631171641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14760.

The product of its digits is 3024, while the sum is 30.

The square root of 631171641 is about 25123.1296020221. The cubic root of 631171641 is about 857.7929893811.

The spelling of 631171641 in words is "six hundred thirty-one million, one hundred seventy-one thousand, six hundred forty-one".