255120517 has 2 divisors, whose sum is σ = 255120518. Its totient is φ = 255120516.

The previous prime is 255120499. The next prime is 255120529. The reversal of 255120517 is 715021552.

255120517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255008961 + 111556 = 15969^2 + 334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255120517 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255120557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127560258 + 127560259.

It is an arithmetic number, because the mean of its divisors is an integer number (127560259).

Almost surely, 2^255120517 is an apocalyptic number.

It is an amenable number.

255120517 is a deficient number, since it is larger than the sum of its proper divisors (1).

255120517 is an equidigital number, since it uses as much as digits as its factorization.

255120517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3500, while the sum is 28.

The square root of 255120517 is about 15972.4925105633. The cubic root of 255120517 is about 634.2324551378.

The spelling of 255120517 in words is "two hundred fifty-five million, one hundred twenty thousand, five hundred seventeen".