51065897 has 16 divisors (see below), whose sum is σ = 55841280. Its totient is φ = 46569600.

The previous prime is 51065893. The next prime is 51065899. The reversal of 51065897 is 79856015.

It is a cyclic number.

It is not a de Polignac number, because 51065897 - 2² = 51065893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51065891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37997 + ... + 39317.

It is an arithmetic number, because the mean of its divisors is an integer number (3490080).

Almost surely, 2^51065897 is an apocalyptic number.

It is an amenable number.

51065897 is a deficient number, since it is larger than the sum of its proper divisors (4775383).

51065897 is a wasteful number, since it uses less digits than its factorization.

51065897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424.

The product of its (nonzero) digits is 75600, while the sum is 41.

The square root of 51065897 is about 7146.0406519974. The cubic root of 51065897 is about 371.0026300117.

The spelling of 51065897 in words is "fifty-one million, sixty-five thousand, eight hundred ninety-seven".