255992705 has 4 divisors (see below), whose sum is σ = 307191252. Its totient is φ = 204794160.

The previous prime is 255992689. The next prime is 255992707. The reversal of 255992705 is 507299552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 193961329 + 62031376 = 13927^2 + 7876^2 .

It is not a de Polignac number, because 255992705 - 2⁴ = 255992689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255992707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25599266 + ... + 25599275.

It is an arithmetic number, because the mean of its divisors is an integer number (76797813).

Almost surely, 2^255992705 is an apocalyptic number.

It is an amenable number.

255992705 is a deficient number, since it is larger than the sum of its proper divisors (51198547).

255992705 is an equidigital number, since it uses as much as digits as its factorization.

255992705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51198546.

The product of its (nonzero) digits is 283500, while the sum is 44.

The square root of 255992705 is about 15999.7720296259. The cubic root of 255992705 is about 634.9543894328.

The spelling of 255992705 in words is "two hundred fifty-five million, nine hundred ninety-two thousand, seven hundred five".