51003065 has 4 divisors (see below), whose sum is σ = 61203684. Its totient is φ = 40802448.

The previous prime is 51003019. The next prime is 51003079. The reversal of 51003065 is 56030015.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20939776 + 30063289 = 4576^2 + 5483^2 .

It is a cyclic number.

It is not a de Polignac number, because 51003065 - 2¹⁰ = 51002041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5100302 + ... + 5100311.

It is an arithmetic number, because the mean of its divisors is an integer number (15300921).

Almost surely, 2^51003065 is an apocalyptic number.

It is an amenable number.

51003065 is a deficient number, since it is larger than the sum of its proper divisors (10200619).

51003065 is a wasteful number, since it uses less digits than its factorization.

51003065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200618.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 51003065 is about 7141.6430182417. The cubic root of 51003065 is about 370.8504057564.

The spelling of 51003065 in words is "fifty-one million, three thousand, sixty-five".