257161355 has 16 divisors (see below), whose sum is σ = 336960000. Its totient is φ = 186852960.

The previous prime is 257161349. The next prime is 257161379. The reversal of 257161355 is 553161752.

It is not a de Polignac number, because 257161355 - 2⁶ = 257161291 is a prime.

It is a super-2 number, since 2×257161355² = 132263925010872050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108776 + ... + 111114.

It is an arithmetic number, because the mean of its divisors is an integer number (21060000).

Almost surely, 2^257161355 is an apocalyptic number.

257161355 is a deficient number, since it is larger than the sum of its proper divisors (79798645).

257161355 is a wasteful number, since it uses less digits than its factorization.

257161355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354.

The product of its digits is 31500, while the sum is 35.

The square root of 257161355 is about 16036.2512764050. The cubic root of 257161355 is about 635.9191475546.

The spelling of 257161355 in words is "two hundred fifty-seven million, one hundred sixty-one thousand, three hundred fifty-five".