505660201 has 2 divisors, whose sum is σ = 505660202. Its totient is φ = 505660200.

The previous prime is 505660157. The next prime is 505660229. The reversal of 505660201 is 102066505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278856601 + 226803600 = 16699^2 + 15060^2 .

It is a cyclic number.

It is not a de Polignac number, because 505660201 - 2¹⁵ = 505627433 is a prime.

It is not a weakly prime, because it can be changed into another prime (505660231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252830100 + 252830101.

It is an arithmetic number, because the mean of its divisors is an integer number (252830101).

Almost surely, 2^505660201 is an apocalyptic number.

It is an amenable number.

505660201 is a deficient number, since it is larger than the sum of its proper divisors (1).

505660201 is an equidigital number, since it uses as much as digits as its factorization.

505660201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 505660201 is about 22486.8895359051. The cubic root of 505660201 is about 796.6842979900.

The spelling of 505660201 in words is "five hundred five million, six hundred sixty thousand, two hundred one".