505522001 has 2 divisors, whose sum is σ = 505522002. Its totient is φ = 505522000.

The previous prime is 505521943. The next prime is 505522079. The reversal of 505522001 is 100225505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317694976 + 187827025 = 17824^2 + 13705^2 .

It is a cyclic number.

It is not a de Polignac number, because 505522001 - 2⁶ = 505521937 is a prime.

It is not a weakly prime, because it can be changed into another prime (505222001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252761000 + 252761001.

It is an arithmetic number, because the mean of its divisors is an integer number (252761001).

Almost surely, 2^505522001 is an apocalyptic number.

It is an amenable number.

505522001 is a deficient number, since it is larger than the sum of its proper divisors (1).

505522001 is an equidigital number, since it uses as much as digits as its factorization.

505522001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 505522001 is about 22483.8164242639. The cubic root of 505522001 is about 796.6117118266.

Adding to 505522001 its reverse (100225505), we get a palindrome (605747506).

The spelling of 505522001 in words is "five hundred five million, five hundred twenty-two thousand, one".