51159065 has 4 divisors (see below), whose sum is σ = 61390884. Its totient is φ = 40927248.

The previous prime is 51159013. The next prime is 51159079. The reversal of 51159065 is 56095115.

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 28472896 + 22686169 = 5336^2 + 4763^2 .

It is a cyclic number.

It is not a de Polignac number, because 51159065 - 2¹⁶ = 51093529 is a prime.

It is a Duffinian number.

It is a Curzon 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, 5115902 + ... + 5115911.

It is an arithmetic number, because the mean of its divisors is an integer number (15347721).

Almost surely, 2^51159065 is an apocalyptic number.

It is an amenable number.

51159065 is a deficient number, since it is larger than the sum of its proper divisors (10231819).

51159065 is a wasteful number, since it uses less digits than its factorization.

51159065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10231818.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 51159065 is about 7152.5565359527. The cubic root of 51159065 is about 371.2281201796.

The spelling of 51159065 in words is "fifty-one million, one hundred fifty-nine thousand, sixty-five".