51566216243 has 8 divisors (see below), whose sum is σ = 51950276640. Its totient is φ = 51182267200.

The previous prime is 51566216237. The next prime is 51566216267. The reversal of 51566216243 is 34261266515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51566216243 - 2¹⁴ = 51566199859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51566216243.

It is not an unprimeable number, because it can be changed into a prime (51566206243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1058618 + ... + 1106256.

It is an arithmetic number, because the mean of its divisors is an integer number (6493784580).

Almost surely, 2^51566216243 is an apocalyptic number.

51566216243 is a deficient number, since it is larger than the sum of its proper divisors (384060397).

51566216243 is a wasteful number, since it uses less digits than its factorization.

51566216243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55677.

The product of its digits is 259200, while the sum is 41.

The spelling of 51566216243 in words is "fifty-one billion, five hundred sixty-six million, two hundred sixteen thousand, two hundred forty-three".