505851253 has 2 divisors, whose sum is σ = 505851254. Its totient is φ = 505851252.

The previous prime is 505851251. The next prime is 505851289. The reversal of 505851253 is 352158505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399720049 + 106131204 = 19993^2 + 10302^2 .

It is a cyclic number.

It is not a de Polignac number, because 505851253 - 2¹ = 505851251 is a prime.

Together with 505851251, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505851251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252925626 + 252925627.

It is an arithmetic number, because the mean of its divisors is an integer number (252925627).

Almost surely, 2^505851253 is an apocalyptic number.

It is an amenable number.

505851253 is a deficient number, since it is larger than the sum of its proper divisors (1).

505851253 is an equidigital number, since it uses as much as digits as its factorization.

505851253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30000, while the sum is 34.

The square root of 505851253 is about 22491.1372100212. The cubic root of 505851253 is about 796.7846215952.

The spelling of 505851253 in words is "five hundred five million, eight hundred fifty-one thousand, two hundred fifty-three".