505280553 has 4 divisors (see below), whose sum is σ = 673707408. Its totient is φ = 336853700.

The previous prime is 505280539. The next prime is 505280557. The reversal of 505280553 is 355082505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505280553 - 2⁸ = 505280297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505280557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84213423 + ... + 84213428.

It is an arithmetic number, because the mean of its divisors is an integer number (168426852).

Almost surely, 2^505280553 is an apocalyptic number.

It is an amenable number.

505280553 is a deficient number, since it is larger than the sum of its proper divisors (168426855).

505280553 is a wasteful number, since it uses less digits than its factorization.

505280553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168426854.

The product of its (nonzero) digits is 30000, while the sum is 33.

The square root of 505280553 is about 22478.4464098389. The cubic root of 505280553 is about 796.4848654287.

The spelling of 505280553 in words is "five hundred five million, two hundred eighty thousand, five hundred fifty-three".