531322217 has 2 divisors, whose sum is σ = 531322218. Its totient is φ = 531322216.

The previous prime is 531322201. The next prime is 531322219. The reversal of 531322217 is 712223135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402363481 + 128958736 = 20059^2 + 11356^2 .

It is a cyclic number.

It is not a de Polignac number, because 531322217 - 2⁴ = 531322201 is a prime.

Together with 531322219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531322219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265661108 + 265661109.

It is an arithmetic number, because the mean of its divisors is an integer number (265661109).

Almost surely, 2^531322217 is an apocalyptic number.

It is an amenable number.

531322217 is a deficient number, since it is larger than the sum of its proper divisors (1).

531322217 is an equidigital number, since it uses as much as digits as its factorization.

531322217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 26.

The square root of 531322217 is about 23050.4276966828. The cubic root of 531322217 is about 809.9396474872.

The spelling of 531322217 in words is "five hundred thirty-one million, three hundred twenty-two thousand, two hundred seventeen".