51366547 has 4 divisors (see below), whose sum is σ = 51771136. Its totient is φ = 50961960.

The previous prime is 51366529. The next prime is 51366559. The reversal of 51366547 is 74566315.

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 51366547 - 2¹¹ = 51364499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51366517) 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, 202104 + ... + 202357.

It is an arithmetic number, because the mean of its divisors is an integer number (12942784).

Almost surely, 2^51366547 is an apocalyptic number.

51366547 is a deficient number, since it is larger than the sum of its proper divisors (404589).

51366547 is a wasteful number, since it uses less digits than its factorization.

51366547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404588.

The product of its digits is 75600, while the sum is 37.

The square root of 51366547 is about 7167.0459046946. The cubic root of 51366547 is about 371.7292973162.

The spelling of 51366547 in words is "fifty-one million, three hundred sixty-six thousand, five hundred forty-seven".