52521257 has 2 divisors, whose sum is σ = 52521258. Its totient is φ = 52521256.

The previous prime is 52521221. The next prime is 52521277. The reversal of 52521257 is 75212525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49900096 + 2621161 = 7064^2 + 1619^2 .

It is a cyclic number.

It is not a de Polignac number, because 52521257 - 2⁶ = 52521193 is a prime.

It is not a weakly prime, because it can be changed into another prime (52521277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26260628 + 26260629.

It is an arithmetic number, because the mean of its divisors is an integer number (26260629).

Almost surely, 2^52521257 is an apocalyptic number.

It is an amenable number.

52521257 is a deficient number, since it is larger than the sum of its proper divisors (1).

52521257 is an equidigital number, since it uses as much as digits as its factorization.

52521257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7000, while the sum is 29.

The square root of 52521257 is about 7247.1550970019. The cubic root of 52521257 is about 374.4941493546.

The spelling of 52521257 in words is "fifty-two million, five hundred twenty-one thousand, two hundred fifty-seven".