505783145 has 12 divisors (see below), whose sum is σ = 706032324. Its totient is φ = 346822560.

The previous prime is 505783139. The next prime is 505783163. The reversal of 505783145 is 541387505.

It can be written as a sum of positive squares in 2 ways, for example, as 324396121 + 181387024 = 18011^2 + 13468^2 .

It is not a de Polignac number, because 505783145 - 2⁴ = 505783129 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505783099 and 505783108.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1031966 + ... + 1032455.

It is an arithmetic number, because the mean of its divisors is an integer number (58836027).

Almost surely, 2^505783145 is an apocalyptic number.

It is an amenable number.

505783145 is a deficient number, since it is larger than the sum of its proper divisors (200249179).

505783145 is a wasteful number, since it uses less digits than its factorization.

505783145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064440 (or 2064433 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 505783145 is about 22489.6230515320. The cubic root of 505783145 is about 796.7488601980.

The spelling of 505783145 in words is "five hundred five million, seven hundred eighty-three thousand, one hundred forty-five".