631310461 has 2 divisors, whose sum is σ = 631310462. Its totient is φ = 631310460.

The previous prime is 631310447. The next prime is 631310501. The reversal of 631310461 is 164013136.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 591997561 + 39312900 = 24331^2 + 6270^2 .

It is a cyclic number.

It is not a de Polignac number, because 631310461 - 2⁵ = 631310429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631310261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315655230 + 315655231.

It is an arithmetic number, because the mean of its divisors is an integer number (315655231).

Almost surely, 2^631310461 is an apocalyptic number.

It is an amenable number.

631310461 is a deficient number, since it is larger than the sum of its proper divisors (1).

631310461 is an equidigital number, since it uses as much as digits as its factorization.

631310461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 631310461 is about 25125.8922428637. The cubic root of 631310461 is about 857.8558724840.

Adding to 631310461 its reverse (164013136), we get a palindrome (795323597).

The spelling of 631310461 in words is "six hundred thirty-one million, three hundred ten thousand, four hundred sixty-one".