257436229 has 2 divisors, whose sum is σ = 257436230. Its totient is φ = 257436228.

The previous prime is 257436199. The next prime is 257436233. The reversal of 257436229 is 922634752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210308004 + 47128225 = 14502^2 + 6865^2 .

It is a cyclic number.

It is not a de Polignac number, because 257436229 - 2¹⁷ = 257305157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257436191 and 257436200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257436259) 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, 128718114 + 128718115.

It is an arithmetic number, because the mean of its divisors is an integer number (128718115).

Almost surely, 2^257436229 is an apocalyptic number.

It is an amenable number.

257436229 is a deficient number, since it is larger than the sum of its proper divisors (1).

257436229 is an equidigital number, since it uses as much as digits as its factorization.

257436229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The square root of 257436229 is about 16044.8193819687. The cubic root of 257436229 is about 636.1456401104.

The spelling of 257436229 in words is "two hundred fifty-seven million, four hundred thirty-six thousand, two hundred twenty-nine".