51004565 has 8 divisors (see below), whose sum is σ = 61893720. Its totient is φ = 40344832.

The previous prime is 51004553. The next prime is 51004609. The reversal of 51004565 is 56540015.

It can be written as a sum of positive squares in 4 ways, for example, as 438244 + 50566321 = 662^2 + 7111^2 .

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 51004565 - 2⁴ = 51004549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56864 + ... + 57753.

It is an arithmetic number, because the mean of its divisors is an integer number (7736715).

Almost surely, 2^51004565 is an apocalyptic number.

It is an amenable number.

51004565 is a deficient number, since it is larger than the sum of its proper divisors (10889155).

51004565 is a wasteful number, since it uses less digits than its factorization.

51004565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114711.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 51004565 is about 7141.7480353202. The cubic root of 51004565 is about 370.8540412906.

The spelling of 51004565 in words is "fifty-one million, four thousand, five hundred sixty-five".