255242321 has 2 divisors, whose sum is σ = 255242322. Its totient is φ = 255242320.

The previous prime is 255242291. The next prime is 255242327. The reversal of 255242321 is 123242552.

255242321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220195921 + 35046400 = 14839^2 + 5920^2 .

It is a cyclic number.

It is not a de Polignac number, because 255242321 - 2¹⁴ = 255225937 is a prime.

It is not a weakly prime, because it can be changed into another prime (255242327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127621160 + 127621161.

It is an arithmetic number, because the mean of its divisors is an integer number (127621161).

Almost surely, 2^255242321 is an apocalyptic number.

It is an amenable number.

255242321 is a deficient number, since it is larger than the sum of its proper divisors (1).

255242321 is an equidigital number, since it uses as much as digits as its factorization.

255242321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4800, while the sum is 26.

The square root of 255242321 is about 15976.3049858220. The cubic root of 255242321 is about 634.3333744469. Note that the first 4 decimals are identical.

Adding to 255242321 its reverse (123242552), we get a palindrome (378484873).

The spelling of 255242321 in words is "two hundred fifty-five million, two hundred forty-two thousand, three hundred twenty-one".