631503113 has 2 divisors, whose sum is σ = 631503114. Its totient is φ = 631503112.

The previous prime is 631503107. The next prime is 631503253. The reversal of 631503113 is 311305136.

It is a happy number.

631503113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 595945744 + 35557369 = 24412^2 + 5963^2 .

It is a cyclic number.

It is not a de Polignac number, because 631503113 - 2¹⁴ = 631486729 is a prime.

It is not a weakly prime, because it can be changed into another prime (631503413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315751556 + 315751557.

It is an arithmetic number, because the mean of its divisors is an integer number (315751557).

Almost surely, 2^631503113 is an apocalyptic number.

It is an amenable number.

631503113 is a deficient number, since it is larger than the sum of its proper divisors (1).

631503113 is an equidigital number, since it uses as much as digits as its factorization.

631503113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 631503113 is about 25129.7256849334. The cubic root of 631503113 is about 857.9431252973.

Adding to 631503113 its reverse (311305136), we get a palindrome (942808249).

The spelling of 631503113 in words is "six hundred thirty-one million, five hundred three thousand, one hundred thirteen".