255431121 has 24 divisors (see below), whose sum is σ = 378111552. Its totient is φ = 153252000.

The previous prime is 255431087. The next prime is 255431129. The reversal of 255431121 is 121134552.

It is a happy number.

It is not a de Polignac number, because 255431121 - 2¹³ = 255422929 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 255431091 and 255431100.

It is not an unprimeable number, because it can be changed into a prime (255431129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33180 + ... + 40146.

It is an arithmetic number, because the mean of its divisors is an integer number (15754648).

Almost surely, 2^255431121 is an apocalyptic number.

It is an amenable number.

255431121 is a deficient number, since it is larger than the sum of its proper divisors (122680431).

255431121 is a wasteful number, since it uses less digits than its factorization.

255431121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7093 (or 7082 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 255431121 is about 15982.2126440615. The cubic root of 255431121 is about 634.4897390913.

Adding to 255431121 its reverse (121134552), we get a palindrome (376565673).

It can be divided in two parts, 255431 and 121, that added together give a palindrome (255552).

The spelling of 255431121 in words is "two hundred fifty-five million, four hundred thirty-one thousand, one hundred twenty-one".