51876865 has 4 divisors (see below), whose sum is σ = 62252244. Its totient is φ = 41501488.

The previous prime is 51876841. The next prime is 51876887. The reversal of 51876865 is 56867815.

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 8105409 + 43771456 = 2847^2 + 6616^2 .

It is a cyclic number.

It is not a de Polignac number, because 51876865 - 2⁹ = 51876353 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, 5187682 + ... + 5187691.

It is an arithmetic number, because the mean of its divisors is an integer number (15563061).

Almost surely, 2^51876865 is an apocalyptic number.

It is an amenable number.

51876865 is a deficient number, since it is larger than the sum of its proper divisors (10375379).

51876865 is a wasteful number, since it uses less digits than its factorization.

51876865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10375378.

The product of its digits is 403200, while the sum is 46.

The square root of 51876865 is about 7202.5596144704. The cubic root of 51876865 is about 372.9562656714.

The spelling of 51876865 in words is "fifty-one million, eight hundred seventy-six thousand, eight hundred sixty-five".