505541251 has 2 divisors, whose sum is σ = 505541252. Its totient is φ = 505541250.

The previous prime is 505541243. The next prime is 505541261. The reversal of 505541251 is 152145505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505541251 - 2³ = 505541243 is a prime.

It is not a weakly prime, because it can be changed into another prime (505541261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252770625 + 252770626.

It is an arithmetic number, because the mean of its divisors is an integer number (252770626).

Almost surely, 2^505541251 is an apocalyptic number.

505541251 is a deficient number, since it is larger than the sum of its proper divisors (1).

505541251 is an equidigital number, since it uses as much as digits as its factorization.

505541251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 505541251 is about 22484.2445058757. The cubic root of 505541251 is about 796.6218232103.

Adding to 505541251 its reverse (152145505), we get a palindrome (657686756).

The spelling of 505541251 in words is "five hundred five million, five hundred forty-one thousand, two hundred fifty-one".