257093455 has 4 divisors (see below), whose sum is σ = 308512152. Its totient is φ = 205674760.

The previous prime is 257093423. The next prime is 257093461. The reversal of 257093455 is 554390752.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 257093455 - 2⁵ = 257093423 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25709341 + ... + 25709350.

It is an arithmetic number, because the mean of its divisors is an integer number (77128038).

Almost surely, 2^257093455 is an apocalyptic number.

257093455 is a deficient number, since it is larger than the sum of its proper divisors (51418697).

257093455 is an equidigital number, since it uses as much as digits as its factorization.

257093455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51418696.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 257093455 is about 16034.1340583145. The cubic root of 257093455 is about 635.8631739928.

The spelling of 257093455 in words is "two hundred fifty-seven million, ninety-three thousand, four hundred fifty-five".