51716563 has 4 divisors (see below), whose sum is σ = 52488520. Its totient is φ = 50944608.

The previous prime is 51716543. The next prime is 51716579. The reversal of 51716563 is 36561715.

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 51716563 - 2⁵ = 51716531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51716543) 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, 385878 + ... + 386011.

It is an arithmetic number, because the mean of its divisors is an integer number (13122130).

Almost surely, 2^51716563 is an apocalyptic number.

51716563 is a deficient number, since it is larger than the sum of its proper divisors (771957).

51716563 is an equidigital number, since it uses as much as digits as its factorization.

51716563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771956.

The product of its digits is 18900, while the sum is 34.

The square root of 51716563 is about 7191.4228772893. The cubic root of 51716563 is about 372.5717183952.

The spelling of 51716563 in words is "fifty-one million, seven hundred sixteen thousand, five hundred sixty-three".