255404423 has 2 divisors, whose sum is σ = 255404424. Its totient is φ = 255404422.

The previous prime is 255404417. The next prime is 255404431. The reversal of 255404423 is 324404552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255404423 - 2¹⁰ = 255403399 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255404453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127702211 + 127702212.

It is an arithmetic number, because the mean of its divisors is an integer number (127702212).

Almost surely, 2^255404423 is an apocalyptic number.

255404423 is a deficient number, since it is larger than the sum of its proper divisors (1).

255404423 is an equidigital number, since it uses as much as digits as its factorization.

255404423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 255404423 is about 15981.3773811896. The cubic root of 255404423 is about 634.4676324177.

Adding to 255404423 its reverse (324404552), we get a palindrome (579808975).

The spelling of 255404423 in words is "two hundred fifty-five million, four hundred four thousand, four hundred twenty-three".