255700217 has 4 divisors (see below), whose sum is σ = 256038756. Its totient is φ = 255361680.

The previous prime is 255700201. The next prime is 255700253. The reversal of 255700217 is 712007552.

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 58690921 + 197009296 = 7661^2 + 14036^2 .

It is a cyclic number.

It is not a de Polignac number, because 255700217 - 2⁴ = 255700201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255700217.

It is not an unprimeable number, because it can be changed into a prime (255700297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168134 + ... + 169647.

It is an arithmetic number, because the mean of its divisors is an integer number (64009689).

Almost surely, 2^255700217 is an apocalyptic number.

It is an amenable number.

255700217 is a deficient number, since it is larger than the sum of its proper divisors (338539).

255700217 is an equidigital number, since it uses as much as digits as its factorization.

255700217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338538.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 255700217 is about 15990.6290370329. The cubic root of 255700217 is about 634.7124719722.

Adding to 255700217 its reverse (712007552), we get a palindrome (967707769).

The spelling of 255700217 in words is "two hundred fifty-five million, seven hundred thousand, two hundred seventeen".