51728207 has 2 divisors, whose sum is σ = 51728208. Its totient is φ = 51728206.

The previous prime is 51728177. The next prime is 51728227. The reversal of 51728207 is 70282715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51728207 - 2¹⁰ = 51727183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51728227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25864103 + 25864104.

It is an arithmetic number, because the mean of its divisors is an integer number (25864104).

Almost surely, 2^51728207 is an apocalyptic number.

51728207 is a deficient number, since it is larger than the sum of its proper divisors (1).

51728207 is an equidigital number, since it uses as much as digits as its factorization.

51728207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 51728207 is about 7192.2324072572. The cubic root of 51728207 is about 372.5996778425.

The spelling of 51728207 in words is "fifty-one million, seven hundred twenty-eight thousand, two hundred seven".