531564811 has 2 divisors, whose sum is σ = 531564812. Its totient is φ = 531564810.

The previous prime is 531564779. The next prime is 531564821. The reversal of 531564811 is 118465135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531564811 - 2⁵ = 531564779 is a prime.

It is a super-2 number, since 2×531564811² = 565122296586931442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (531564821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265782405 + 265782406.

It is an arithmetic number, because the mean of its divisors is an integer number (265782406).

Almost surely, 2^531564811 is an apocalyptic number.

531564811 is a deficient number, since it is larger than the sum of its proper divisors (1).

531564811 is an equidigital number, since it uses as much as digits as its factorization.

531564811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 34.

The square root of 531564811 is about 23055.6893412450. The cubic root of 531564811 is about 810.0628976205.

The spelling of 531564811 in words is "five hundred thirty-one million, five hundred sixty-four thousand, eight hundred eleven".