631043361 has 36 divisors (see below), whose sum is σ = 1005326868. Its totient is φ = 379173312.

The previous prime is 631043359. The next prime is 631043363. The reversal of 631043361 is 163340136.

631043361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (631043359) and next prime (631043363).

It can be written as a sum of positive squares in 2 ways, for example, as 426009600 + 205033761 = 20640^2 + 14319^2 .

It is not a de Polignac number, because 631043361 - 2¹ = 631043359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631043363) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 214875 + ... + 217791.

Almost surely, 2^631043361 is an apocalyptic number.

It is an amenable number.

631043361 is a deficient number, since it is larger than the sum of its proper divisors (374283507).

631043361 is a wasteful number, since it uses less digits than its factorization.

631043361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3022 (or 2976 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 631043361 is about 25120.5764464114. The cubic root of 631043361 is about 857.7348725219.

Adding to 631043361 its reverse (163340136), we get a palindrome (794383497).

The spelling of 631043361 in words is "six hundred thirty-one million, forty-three thousand, three hundred sixty-one".