505871023 has 16 divisors (see below), whose sum is σ = 615078144. Its totient is φ = 406143360.

The previous prime is 505871021. The next prime is 505871027. The reversal of 505871023 is 320178505.

It is not a de Polignac number, because 505871023 - 2¹ = 505871021 is a prime.

It is a super-2 number, since 2×505871023² = 511810983822133058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505871021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15036 + ... + 35182.

It is an arithmetic number, because the mean of its divisors is an integer number (38442384).

Almost surely, 2^505871023 is an apocalyptic number.

505871023 is a deficient number, since it is larger than the sum of its proper divisors (109207121).

505871023 is a wasteful number, since it uses less digits than its factorization.

505871023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20382.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 505871023 is about 22491.5767121827. The cubic root of 505871023 is about 796.7950016076.

The spelling of 505871023 in words is "five hundred five million, eight hundred seventy-one thousand, twenty-three".