51716887 has 4 divisors (see below), whose sum is σ = 51744616. Its totient is φ = 51689160.

The previous prime is 51716869. The next prime is 51716911. The reversal of 51716887 is 78861715.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51716887 - 2⁷ = 51716759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51716807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10848 + ... + 14869.

It is an arithmetic number, because the mean of its divisors is an integer number (12936154).

Almost surely, 2^51716887 is an apocalyptic number.

51716887 is a deficient number, since it is larger than the sum of its proper divisors (27729).

51716887 is a wasteful number, since it uses less digits than its factorization.

51716887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27728.

The product of its digits is 94080, while the sum is 43.

The square root of 51716887 is about 7191.4454040895. The cubic root of 51716887 is about 372.5724964373.

The spelling of 51716887 in words is "fifty-one million, seven hundred sixteen thousand, eight hundred eighty-seven".