505545023 has 16 divisors (see below), whose sum is σ = 549653280. Its totient is φ = 463833216.

The previous prime is 505545013. The next prime is 505545121. The reversal of 505545023 is 320545505.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 505545023 - 2¹² = 505540927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505545013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40661 + ... + 51617.

It is an arithmetic number, because the mean of its divisors is an integer number (34353330).

Almost surely, 2^505545023 is an apocalyptic number.

505545023 is a deficient number, since it is larger than the sum of its proper divisors (44108257).

505545023 is a wasteful number, since it uses less digits than its factorization.

505545023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11066.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 505545023 is about 22484.3283866786. The cubic root of 505545023 is about 796.6238044862.

The spelling of 505545023 in words is "five hundred five million, five hundred forty-five thousand, twenty-three".