51830447 has 4 divisors (see below), whose sum is σ = 51850176. Its totient is φ = 51810720.

The previous prime is 51830417. The next prime is 51830483. The reversal of 51830447 is 74403815.

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 51830447 - 2¹⁸ = 51568303 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 (51830407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5183 + ... + 11424.

It is an arithmetic number, because the mean of its divisors is an integer number (12962544).

Almost surely, 2^51830447 is an apocalyptic number.

51830447 is a deficient number, since it is larger than the sum of its proper divisors (19729).

51830447 is a wasteful number, since it uses less digits than its factorization.

51830447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19728.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 51830447 is about 7199.3365666567. The cubic root of 51830447 is about 372.8449954555.

The spelling of 51830447 in words is "fifty-one million, eight hundred thirty thousand, four hundred forty-seven".