505228855 has 32 divisors (see below), whose sum is σ = 647958528. Its totient is φ = 377529600.

The previous prime is 505228849. The next prime is 505228861. The reversal of 505228855 is 558822505.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (505228849) and next prime (505228861).

It is a de Polignac number, because none of the positive numbers 2^k-505228855 is a prime.

It is a super-2 number, since 2×505228855² = 510512391849222050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 679614 + ... + 680356.

It is an arithmetic number, because the mean of its divisors is an integer number (20248704).

Almost surely, 2^505228855 is an apocalyptic number.

505228855 is a deficient number, since it is larger than the sum of its proper divisors (142729673).

505228855 is a wasteful number, since it uses less digits than its factorization.

505228855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927.

The product of its (nonzero) digits is 160000, while the sum is 40.

The square root of 505228855 is about 22477.2964344024. The cubic root of 505228855 is about 796.4577002701.

The spelling of 505228855 in words is "five hundred five million, two hundred twenty-eight thousand, eight hundred fifty-five".