51573065 has 4 divisors (see below), whose sum is σ = 61887684. Its totient is φ = 41258448.

The previous prime is 51573059. The next prime is 51573077. The reversal of 51573065 is 56037515.

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 6990736 + 44582329 = 2644^2 + 6677^2 .

It is a cyclic number.

It is not a de Polignac number, because 51573065 - 2⁶ = 51573001 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, 5157302 + ... + 5157311.

It is an arithmetic number, because the mean of its divisors is an integer number (15471921).

Almost surely, 2^51573065 is an apocalyptic number.

It is an amenable number.

51573065 is a deficient number, since it is larger than the sum of its proper divisors (10314619).

51573065 is a wasteful number, since it uses less digits than its factorization.

51573065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10314618.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 51573065 is about 7181.4389226672. The cubic root of 51573065 is about 372.2268074813.

The spelling of 51573065 in words is "fifty-one million, five hundred seventy-three thousand, sixty-five".