255687471 has 12 divisors (see below), whose sum is σ = 397736248. Its totient is φ = 157346064.

The previous prime is 255687469. The next prime is 255687491. The reversal of 255687471 is 174786552.

It is not a de Polignac number, because 255687471 - 2¹ = 255687469 is a prime.

It is a super-3 number, since 3×255687471³ (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 (255687451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1092565 + ... + 1092798.

Almost surely, 2^255687471 is an apocalyptic number.

255687471 is a deficient number, since it is larger than the sum of its proper divisors (142048777).

255687471 is a wasteful number, since it uses less digits than its factorization.

255687471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2185382 (or 2185379 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 255687471 is about 15990.2304861437. The cubic root of 255687471 is about 634.7019255340.

The spelling of 255687471 in words is "two hundred fifty-five million, six hundred eighty-seven thousand, four hundred seventy-one".