505160561 has 2 divisors, whose sum is σ = 505160562. Its totient is φ = 505160560.

The previous prime is 505160507. The next prime is 505160563. The reversal of 505160561 is 165061505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272415025 + 232745536 = 16505^2 + 15256^2 .

It is a cyclic number.

It is not a de Polignac number, because 505160561 - 2²⁶ = 438051697 is a prime.

Together with 505160563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (505160563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252580280 + 252580281.

It is an arithmetic number, because the mean of its divisors is an integer number (252580281).

Almost surely, 2^505160561 is an apocalyptic number.

It is an amenable number.

505160561 is a deficient number, since it is larger than the sum of its proper divisors (1).

505160561 is an equidigital number, since it uses as much as digits as its factorization.

505160561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 505160561 is about 22475.7772056941. Note that the first 3 decimals coincide. The cubic root of 505160561 is about 796.4218117596.

The spelling of 505160561 in words is "five hundred five million, one hundred sixty thousand, five hundred sixty-one".