505000051 has 4 divisors (see below), whose sum is σ = 509469192. Its totient is φ = 500530912.

The previous prime is 505000043. The next prime is 505000073. The reversal of 505000051 is 150000505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505000051 - 2³ = 505000043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 504999989 and 505000034.

It is not an unprimeable number, because it can be changed into a prime (505000091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2234401 + ... + 2234626.

It is an arithmetic number, because the mean of its divisors is an integer number (127367298).

Almost surely, 2^505000051 is an apocalyptic number.

505000051 is a deficient number, since it is larger than the sum of its proper divisors (4469141).

505000051 is a wasteful number, since it uses less digits than its factorization.

505000051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469140.

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 505000051 is about 22472.2061889793. The cubic root of 505000051 is about 796.3374509863.

Adding to 505000051 its reverse (150000505), we get a palindrome (655000556).

The spelling of 505000051 in words is "five hundred five million, fifty-one", and thus it is an aban number.