257233159 has 2 divisors, whose sum is σ = 257233160. Its totient is φ = 257233158.

The previous prime is 257233121. The next prime is 257233169. The reversal of 257233159 is 951332752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257233159 - 2¹¹ = 257231111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257233169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128616579 + 128616580.

It is an arithmetic number, because the mean of its divisors is an integer number (128616580).

Almost surely, 2^257233159 is an apocalyptic number.

257233159 is a deficient number, since it is larger than the sum of its proper divisors (1).

257233159 is an equidigital number, since it uses as much as digits as its factorization.

257233159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 257233159 is about 16038.4899226829. The cubic root of 257233159 is about 635.9783286723.

It can be divided in two parts, 25723 and 3159, that added together give a palindrome (28882).

The spelling of 257233159 in words is "two hundred fifty-seven million, two hundred thirty-three thousand, one hundred fifty-nine".