257051563 has 8 divisors (see below), whose sum is σ = 266774400. Its totient is φ = 247386048.

The previous prime is 257051527. The next prime is 257051567. The reversal of 257051563 is 365150752.

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 257051563 - 2⁹ = 257051051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257051567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5083 + ... + 23236.

It is an arithmetic number, because the mean of its divisors is an integer number (33346800).

Almost surely, 2^257051563 is an apocalyptic number.

257051563 is a deficient number, since it is larger than the sum of its proper divisors (9722837).

257051563 is a wasteful number, since it uses less digits than its factorization.

257051563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28661.

The product of its (nonzero) digits is 31500, while the sum is 34.

The square root of 257051563 is about 16032.8276670087. The cubic root of 257051563 is about 635.8286352852.

The spelling of 257051563 in words is "two hundred fifty-seven million, fifty-one thousand, five hundred sixty-three".