255421843 has 2 divisors, whose sum is σ = 255421844. Its totient is φ = 255421842.

The previous prime is 255421811. The next prime is 255421919. The reversal of 255421843 is 348124552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255421843 - 2⁵ = 255421811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255421799 and 255421808.

It is not a weakly prime, because it can be changed into another prime (255421643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127710921 + 127710922.

It is an arithmetic number, because the mean of its divisors is an integer number (127710922).

Almost surely, 2^255421843 is an apocalyptic number.

255421843 is a deficient number, since it is larger than the sum of its proper divisors (1).

255421843 is an equidigital number, since it uses as much as digits as its factorization.

255421843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 34.

The square root of 255421843 is about 15981.9223812406. The cubic root of 255421843 is about 634.4820568284.

The spelling of 255421843 in words is "two hundred fifty-five million, four hundred twenty-one thousand, eight hundred forty-three".