255431 has 6 divisors (see below), whose sum is σ = 280896. Its totient is φ = 232100.

The previous prime is 255419. The next prime is 255443. The reversal of 255431 is 134552.

It is an interprime number because it is at equal distance from previous prime (255419) and next prime (255443).

It is not a de Polignac number, because 255431 - 2¹⁰ = 254407 is a prime.

It is a super-2 number, since 2×255431² = 130489991522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 935 + ... + 1176.

It is an arithmetic number, because the mean of its divisors is an integer number (46816).

2²⁵⁵⁴³¹ is an apocalyptic number.

255431 is a deficient number, since it is larger than the sum of its proper divisors (25465).

255431 is a wasteful number, since it uses less digits than its factorization.

255431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133 (or 2122 counting only the distinct ones).

The product of its digits is 600, while the sum is 20.

The square root of 255431 is about 505.4018203370. The cubic root of 255431 is about 63.4489638903.

Adding to 255431 its reverse (134552), we get a palindrome (389983).

It can be divided in two parts, 255 and 431, that added together give a palindrome (686).

The spelling of 255431 in words is "two hundred fifty-five thousand, four hundred thirty-one".