631622441 has 2 divisors, whose sum is σ = 631622442. Its totient is φ = 631622440.

The previous prime is 631622429. The next prime is 631622483. The reversal of 631622441 is 144226136.

631622441 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., 605356816 + 26265625 = 24604^2 + 5125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631622441 is a prime.

It is a super-3 number, since 3×631622441³ (a number of 27 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (631625441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315811220 + 315811221.

It is an arithmetic number, because the mean of its divisors is an integer number (315811221).

Almost surely, 2^631622441 is an apocalyptic number.

It is an amenable number.

631622441 is a deficient number, since it is larger than the sum of its proper divisors (1).

631622441 is an equidigital number, since it uses as much as digits as its factorization.

631622441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 631622441 is about 25132.0998127892. The cubic root of 631622441 is about 857.9971604965.

Adding to 631622441 its reverse (144226136), we get a palindrome (775848577).

The spelling of 631622441 in words is "six hundred thirty-one million, six hundred twenty-two thousand, four hundred forty-one".