257056355 has 8 divisors (see below), whose sum is σ = 311198112. Its totient is φ = 203824768.

The previous prime is 257056291. The next prime is 257056361. The reversal of 257056355 is 553650752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257056355 - 2⁶ = 257056291 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226919 + ... + 228048.

It is an arithmetic number, because the mean of its divisors is an integer number (38899764).

Almost surely, 2^257056355 is an apocalyptic number.

257056355 is a deficient number, since it is larger than the sum of its proper divisors (54141757).

257056355 is a wasteful number, since it uses less digits than its factorization.

257056355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455085.

The product of its (nonzero) digits is 157500, while the sum is 38.

The square root of 257056355 is about 16032.9771096949. The cubic root of 257056355 is about 635.8325863367.

The spelling of 257056355 in words is "two hundred fifty-seven million, fifty-six thousand, three hundred fifty-five".