531564541 has 2 divisors, whose sum is σ = 531564542. Its totient is φ = 531564540.

The previous prime is 531564529. The next prime is 531564547. The reversal of 531564541 is 145465135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 276523641 + 255040900 = 16629^2 + 15970^2 .

It is a cyclic number.

It is not a de Polignac number, because 531564541 - 2⁹ = 531564029 is a prime.

It is a super-2 number, since 2×531564541² = 565121722497081362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 531564497 and 531564506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531564547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265782270 + 265782271.

It is an arithmetic number, because the mean of its divisors is an integer number (265782271).

Almost surely, 2^531564541 is an apocalyptic number.

It is an amenable number.

531564541 is a deficient number, since it is larger than the sum of its proper divisors (1).

531564541 is an equidigital number, since it uses as much as digits as its factorization.

531564541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36000, while the sum is 34.

The square root of 531564541 is about 23055.6834858566. The cubic root of 531564541 is about 810.0627604676.

The spelling of 531564541 in words is "five hundred thirty-one million, five hundred sixty-four thousand, five hundred forty-one".