257087351 has 2 divisors, whose sum is σ = 257087352. Its totient is φ = 257087350.

The previous prime is 257087339. The next prime is 257087381. The reversal of 257087351 is 153780752.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257087351 - 2¹⁰ = 257086327 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257087381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128543675 + 128543676.

It is an arithmetic number, because the mean of its divisors is an integer number (128543676).

Almost surely, 2^257087351 is an apocalyptic number.

257087351 is a deficient number, since it is larger than the sum of its proper divisors (1).

257087351 is an equidigital number, since it uses as much as digits as its factorization.

257087351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 257087351 is about 16033.9437132603. The cubic root of 257087351 is about 635.8581416600.

The spelling of 257087351 in words is "two hundred fifty-seven million, eighty-seven thousand, three hundred fifty-one".