257236523 has 2 divisors, whose sum is σ = 257236524. Its totient is φ = 257236522.

The previous prime is 257236513. The next prime is 257236549. The reversal of 257236523 is 325632752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257236523 - 2¹⁶ = 257170987 is a prime.

It is not a weakly prime, because it can be changed into another prime (257236513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128618261 + 128618262.

It is an arithmetic number, because the mean of its divisors is an integer number (128618262).

Almost surely, 2^257236523 is an apocalyptic number.

257236523 is a deficient number, since it is larger than the sum of its proper divisors (1).

257236523 is an equidigital number, since it uses as much as digits as its factorization.

257236523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 35.

The square root of 257236523 is about 16038.5947950561. The cubic root of 257236523 is about 635.9811010233.

The spelling of 257236523 in words is "two hundred fifty-seven million, two hundred thirty-six thousand, five hundred twenty-three".