500542561 has 2 divisors, whose sum is σ = 500542562. Its totient is φ = 500542560.

The previous prime is 500542529. The next prime is 500542579. The reversal of 500542561 is 165245005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499254336 + 1288225 = 22344^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 500542561 - 2⁵ = 500542529 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (500540561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250271280 + 250271281.

It is an arithmetic number, because the mean of its divisors is an integer number (250271281).

Almost surely, 2^500542561 is an apocalyptic number.

It is an amenable number.

500542561 is a deficient number, since it is larger than the sum of its proper divisors (1).

500542561 is an equidigital number, since it uses as much as digits as its factorization.

500542561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 500542561 is about 22372.8085183778. The cubic root of 500542561 is about 793.9875095058.

Adding to 500542561 its reverse (165245005), we get a palindrome (665787566).

The spelling of 500542561 in words is "five hundred million, five hundred forty-two thousand, five hundred sixty-one".