255100321 has 12 divisors (see below), whose sum is σ = 297715332. Its totient is φ = 217945728.

The previous prime is 255100267. The next prime is 255100393. The reversal of 255100321 is 123001552.

It can be written as a sum of positive squares in 2 ways, for example, as 13608721 + 241491600 = 3689^2 + 15540^2 .

It is not a de Polignac number, because 255100321 - 2¹³ = 255092129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255100621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7021 + ... + 23653.

It is an arithmetic number, because the mean of its divisors is an integer number (24809611).

Almost surely, 2^255100321 is an apocalyptic number.

It is an amenable number.

255100321 is a deficient number, since it is larger than the sum of its proper divisors (42615011).

255100321 is a wasteful number, since it uses less digits than its factorization.

255100321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16960 (or 16953 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 255100321 is about 15971.8602861407. The cubic root of 255100321 is about 634.2157188690.

Adding to 255100321 its reverse (123001552), we get a palindrome (378101873).

It can be divided in two parts, 255 and 100321, that added together give a triangular number (100576 = T₄₄₈).

The spelling of 255100321 in words is "two hundred fifty-five million, one hundred thousand, three hundred twenty-one".