632217217 has 2 divisors, whose sum is σ = 632217218. Its totient is φ = 632217216.

The previous prime is 632217181. The next prime is 632217221. The reversal of 632217217 is 712712236.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 625200016 + 7017201 = 25004^2 + 2649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-632217217 is a prime.

It is not a weakly prime, because it can be changed into another prime (632217247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316108608 + 316108609.

It is an arithmetic number, because the mean of its divisors is an integer number (316108609).

Almost surely, 2^632217217 is an apocalyptic number.

It is an amenable number.

632217217 is a deficient number, since it is larger than the sum of its proper divisors (1).

632217217 is an equidigital number, since it uses as much as digits as its factorization.

632217217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 31.

The square root of 632217217 is about 25143.9300229698. The cubic root of 632217217 is about 858.2663909669.

The spelling of 632217217 in words is "six hundred thirty-two million, two hundred seventeen thousand, two hundred seventeen".