255804139 has 2 divisors, whose sum is σ = 255804140. Its totient is φ = 255804138.

The previous prime is 255804121. The next prime is 255804167. The reversal of 255804139 is 931408552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255804139 - 2⁹ = 255803627 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 255804098 and 255804107.

It is not a weakly prime, because it can be changed into another prime (255804169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127902069 + 127902070.

It is an arithmetic number, because the mean of its divisors is an integer number (127902070).

Almost surely, 2^255804139 is an apocalyptic number.

255804139 is a deficient number, since it is larger than the sum of its proper divisors (1).

255804139 is an equidigital number, since it uses as much as digits as its factorization.

255804139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 255804139 is about 15993.8781726009. The cubic root of 255804139 is about 634.7984472031.

The spelling of 255804139 in words is "two hundred fifty-five million, eight hundred four thousand, one hundred thirty-nine".