52728257 has 2 divisors, whose sum is σ = 52728258. Its totient is φ = 52728256.

The previous prime is 52728251. The next prime is 52728289. The reversal of 52728257 is 75282725.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52287361 + 440896 = 7231^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 52728257 - 2⁸ = 52728001 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52728257.

It is not a weakly prime, because it can be changed into another prime (52728251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26364128 + 26364129.

It is an arithmetic number, because the mean of its divisors is an integer number (26364129).

Almost surely, 2^52728257 is an apocalyptic number.

It is an amenable number.

52728257 is a deficient number, since it is larger than the sum of its proper divisors (1).

52728257 is an equidigital number, since it uses as much as digits as its factorization.

52728257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78400, while the sum is 38.

The square root of 52728257 is about 7261.4225190385. The cubic root of 52728257 is about 374.9854975132.

The spelling of 52728257 in words is "fifty-two million, seven hundred twenty-eight thousand, two hundred fifty-seven".