53657257 has 2 divisors, whose sum is σ = 53657258. Its totient is φ = 53657256.

The previous prime is 53657251. The next prime is 53657293. The reversal of 53657257 is 75275635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48944016 + 4713241 = 6996^2 + 2171^2 .

It is a cyclic number.

It is not a de Polignac number, because 53657257 - 2¹¹ = 53655209 is a prime.

It is not a weakly prime, because it can be changed into another prime (53657251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26828628 + 26828629.

It is an arithmetic number, because the mean of its divisors is an integer number (26828629).

Almost surely, 2^53657257 is an apocalyptic number.

It is an amenable number.

53657257 is a deficient number, since it is larger than the sum of its proper divisors (1).

53657257 is an equidigital number, since it uses as much as digits as its factorization.

53657257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 220500, while the sum is 40.

The square root of 53657257 is about 7325.1113984703. Note that the first 3 decimals coincide. The cubic root of 53657257 is about 377.1749335324.

The spelling of 53657257 in words is "fifty-three million, six hundred fifty-seven thousand, two hundred fifty-seven".