505645043 has 16 divisors (see below), whose sum is σ = 543194400. Its totient is φ = 469255680.

The previous prime is 505645027. The next prime is 505645067. The reversal of 505645043 is 340546505.

It is a cyclic number.

It is not a de Polignac number, because 505645043 - 2⁴ = 505645027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505645003) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 338843 + ... + 340331.

It is an arithmetic number, because the mean of its divisors is an integer number (33949650).

Almost surely, 2^505645043 is an apocalyptic number.

505645043 is a deficient number, since it is larger than the sum of its proper divisors (37549357).

505645043 is a wasteful number, since it uses less digits than its factorization.

505645043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 505645043 is about 22486.5524925454. The cubic root of 505645043 is about 796.6763372678.

The spelling of 505645043 in words is "five hundred five million, six hundred forty-five thousand, forty-three".