505553361 has 16 divisors (see below), whose sum is σ = 714225600. Its totient is φ = 316986368.

The previous prime is 505553357. The next prime is 505553369. The reversal of 505553361 is 163355505.

It is a cyclic number.

It is not a de Polignac number, because 505553361 - 2² = 505553357 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505553369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98425 + ... + 103433.

It is an arithmetic number, because the mean of its divisors is an integer number (44639100).

Almost surely, 2^505553361 is an apocalyptic number.

505553361 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

505553361 is a deficient number, since it is larger than the sum of its proper divisors (208672239).

505553361 is a wasteful number, since it uses less digits than its factorization.

505553361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7008.

The product of its (nonzero) digits is 33750, while the sum is 33.

The square root of 505553361 is about 22484.5138039496. The cubic root of 505553361 is about 796.6281840584.

The spelling of 505553361 in words is "five hundred five million, five hundred fifty-three thousand, three hundred sixty-one".