257087355 has 16 divisors (see below), whose sum is σ = 470102784. Its totient is φ = 117525600.

The previous prime is 257087351. The next prime is 257087381. The reversal of 257087355 is 553780752.

It is not a de Polignac number, because 257087355 - 2² = 257087351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (257087351) 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 in 15 ways as a sum of consecutive naturals, for example, 1224121 + ... + 1224330.

It is an arithmetic number, because the mean of its divisors is an integer number (29381424).

Almost surely, 2^257087355 is an apocalyptic number.

257087355 is a deficient number, since it is larger than the sum of its proper divisors (213015429).

257087355 is a wasteful number, since it uses less digits than its factorization.

257087355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448466.

The product of its (nonzero) digits is 294000, while the sum is 42.

The square root of 257087355 is about 16033.9438379957. The cubic root of 257087355 is about 635.8581449577.

The spelling of 257087355 in words is "two hundred fifty-seven million, eighty-seven thousand, three hundred fifty-five".