257287471 has 16 divisors (see below), whose sum is σ = 297561600. Its totient is φ = 217909728.

The previous prime is 257287451. The next prime is 257287483. The reversal of 257287471 is 174782752.

It is a cyclic number.

It is not a de Polignac number, because 257287471 - 2¹¹ = 257285423 is a prime.

It is a super-3 number, since 3×257287471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257287421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 261246 + ... + 262228.

It is an arithmetic number, because the mean of its divisors is an integer number (18597600).

Almost surely, 2^257287471 is an apocalyptic number.

257287471 is a deficient number, since it is larger than the sum of its proper divisors (40274129).

257287471 is a wasteful number, since it uses less digits than its factorization.

257287471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398.

The product of its digits is 219520, while the sum is 43.

The square root of 257287471 is about 16040.1830101779. The cubic root of 257287471 is about 636.0230855049.

The spelling of 257287471 in words is "two hundred fifty-seven million, two hundred eighty-seven thousand, four hundred seventy-one".