531541817 has 2 divisors, whose sum is σ = 531541818. Its totient is φ = 531541816.

The previous prime is 531541781. The next prime is 531541831. The reversal of 531541817 is 718145135.

Together with previous prime (531541781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 528816016 + 2725801 = 22996^2 + 1651^2 .

It is a cyclic number.

It is not a de Polignac number, because 531541817 - 2²⁰ = 530493241 is a prime.

It is a super-2 number, since 2×531541817² = 565073406439322978, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (531541837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265770908 + 265770909.

It is an arithmetic number, because the mean of its divisors is an integer number (265770909).

Almost surely, 2^531541817 is an apocalyptic number.

It is an amenable number.

531541817 is a deficient number, since it is larger than the sum of its proper divisors (1).

531541817 is an equidigital number, since it uses as much as digits as its factorization.

531541817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 35.

The square root of 531541817 is about 23055.1906736856. The cubic root of 531541817 is about 810.0512171039.

The spelling of 531541817 in words is "five hundred thirty-one million, five hundred forty-one thousand, eight hundred seventeen".