505144805 has 16 divisors (see below), whose sum is σ = 677412288. Its totient is φ = 358416000.

The previous prime is 505144799. The next prime is 505144819. The reversal of 505144805 is 508441505.

It is not a de Polignac number, because 505144805 - 2⁴ = 505144789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109751 + ... + 114260.

It is an arithmetic number, because the mean of its divisors is an integer number (42338268).

Almost surely, 2^505144805 is an apocalyptic number.

505144805 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

505144805 is a deficient number, since it is larger than the sum of its proper divisors (172267483).

505144805 is a wasteful number, since it uses less digits than its factorization.

505144805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224068.

The product of its (nonzero) digits is 16000, while the sum is 32.

The square root of 505144805 is about 22475.4266922788. The cubic root of 505144805 is about 796.4135315193.

The spelling of 505144805 in words is "five hundred five million, one hundred forty-four thousand, eight hundred five".