51186065 has 16 divisors (see below), whose sum is σ = 74328192. Its totient is φ = 33033984.

The previous prime is 51186049. The next prime is 51186071. The reversal of 51186065 is 56068115.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51186065 - 2⁴ = 51186049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42419 + ... + 43608.

It is an arithmetic number, because the mean of its divisors is an integer number (4645512).

Almost surely, 2^51186065 is an apocalyptic number.

It is an amenable number.

51186065 is a deficient number, since it is larger than the sum of its proper divisors (23142127).

51186065 is a wasteful number, since it uses less digits than its factorization.

51186065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86056.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 51186065 is about 7154.4437240082. The cubic root of 51186065 is about 371.2934158509.

The spelling of 51186065 in words is "fifty-one million, one hundred eighty-six thousand, sixty-five".