255205431 has 32 divisors (see below), whose sum is σ = 409086720. Its totient is φ = 156308832.

The previous prime is 255205429. The next prime is 255205459. The reversal of 255205431 is 134502552.

It is a happy number.

255205431 is a `hidden beast` number, since 25 + 5 + 205 + 431 = 666.

255205431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 255205431 - 2¹ = 255205429 is a prime.

It is a super-2 number, since 2×255205431² = 130259624023791522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 255205395 and 255205404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255207431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78076 + ... + 81278.

It is an arithmetic number, because the mean of its divisors is an integer number (12783960).

Almost surely, 2^255205431 is an apocalyptic number.

255205431 is a deficient number, since it is larger than the sum of its proper divisors (153881289).

255205431 is a wasteful number, since it uses less digits than its factorization.

255205431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452 (or 3446 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 255205431 is about 15975.1504218270. The cubic root of 255205431 is about 634.3028130500.

Adding to 255205431 its reverse (134502552), we get a palindrome (389707983).

The spelling of 255205431 in words is "two hundred fifty-five million, two hundred five thousand, four hundred thirty-one".