531322291 has 2 divisors, whose sum is σ = 531322292. Its totient is φ = 531322290.

The previous prime is 531322283. The next prime is 531322349. The reversal of 531322291 is 192223135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531322291 - 2³ = 531322283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531322201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265661145 + 265661146.

It is an arithmetic number, because the mean of its divisors is an integer number (265661146).

Almost surely, 2^531322291 is an apocalyptic number.

531322291 is a deficient number, since it is larger than the sum of its proper divisors (1).

531322291 is an equidigital number, since it uses as much as digits as its factorization.

531322291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 531322291 is about 23050.4293018590. The cubic root of 531322291 is about 809.9396850887.

The spelling of 531322291 in words is "five hundred thirty-one million, three hundred twenty-two thousand, two hundred ninety-one".