255126321 has 16 divisors (see below), whose sum is σ = 378230400. Its totient is φ = 169964784.

The previous prime is 255126307. The next prime is 255126323. The reversal of 255126321 is 123621552.

It is a happy number.

255126321 is a `hidden beast` number, since 25 + 5 + 1 + 2 + 632 + 1 = 666.

It is not a de Polignac number, because 255126321 - 2⁹ = 255125809 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (255126323) 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, 53580 + ... + 58146.

It is an arithmetic number, because the mean of its divisors is an integer number (23639400).

Almost surely, 2^255126321 is an apocalyptic number.

It is an amenable number.

255126321 is a deficient number, since it is larger than the sum of its proper divisors (123104079).

255126321 is a wasteful number, since it uses less digits than its factorization.

255126321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645 (or 6639 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 255126321 is about 15972.6741968901. The cubic root of 255126321 is about 634.2372647043.

Adding to 255126321 its reverse (123621552), we get a palindrome (378747873).

The spelling of 255126321 in words is "two hundred fifty-five million, one hundred twenty-six thousand, three hundred twenty-one".