51004505 has 8 divisors (see below), whose sum is σ = 64805832. Its totient is φ = 38403328.

The previous prime is 51004469. The next prime is 51004507. The reversal of 51004505 is 50540015.

It can be written as a sum of positive squares in 4 ways, for example, as 8128201 + 42876304 = 2851^2 + 6548^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51004505 - 2¹⁴ = 50988121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51004507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299942 + ... + 300111.

It is an arithmetic number, because the mean of its divisors is an integer number (8100729).

Almost surely, 2^51004505 is an apocalyptic number.

It is an amenable number.

51004505 is a deficient number, since it is larger than the sum of its proper divisors (13801327).

51004505 is a wasteful number, since it uses less digits than its factorization.

51004505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600075.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 51004505 is about 7141.7438346667. The cubic root of 51004505 is about 370.8538958706.

The spelling of 51004505 in words is "fifty-one million, four thousand, five hundred five".