505557247 has 6 divisors (see below), whose sum is σ = 547437912. Its totient is φ = 466668072.

The previous prime is 505557223. The next prime is 505557259. The reversal of 505557247 is 742755505.

It is not a de Polignac number, because 505557247 - 2¹⁹ = 505032959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505557847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1495563 + ... + 1495900.

It is an arithmetic number, because the mean of its divisors is an integer number (91239652).

Almost surely, 2^505557247 is an apocalyptic number.

505557247 is a deficient number, since it is larger than the sum of its proper divisors (41880665).

505557247 is a wasteful number, since it uses less digits than its factorization.

505557247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991489 (or 2991476 counting only the distinct ones).

The product of its (nonzero) digits is 245000, while the sum is 40.

The square root of 505557247 is about 22484.6002188164. The cubic root of 505557247 is about 796.6302251810.

The spelling of 505557247 in words is "five hundred five million, five hundred fifty-seven thousand, two hundred forty-seven".