51065859 has 16 divisors (see below), whose sum is σ = 74423552. Its totient is φ = 30954528.

The previous prime is 51065851. The next prime is 51065879. The reversal of 51065859 is 95856015.

It is not a de Polignac number, because 51065859 - 2³ = 51065851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51065851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7159 + ... + 12384.

It is an arithmetic number, because the mean of its divisors is an integer number (4651472).

Almost surely, 2^51065859 is an apocalyptic number.

51065859 is a deficient number, since it is larger than the sum of its proper divisors (23357693).

51065859 is a wasteful number, since it uses less digits than its factorization.

51065859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19626.

The product of its (nonzero) digits is 54000, while the sum is 39.

The square root of 51065859 is about 7146.0379931820. The cubic root of 51065859 is about 371.0025379861.

The spelling of 51065859 in words is "fifty-one million, sixty-five thousand, eight hundred fifty-nine".