255055517 has 2 divisors, whose sum is σ = 255055518. Its totient is φ = 255055516.

The previous prime is 255055513. The next prime is 255055519. The reversal of 255055517 is 715550552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 224430361 + 30625156 = 14981^2 + 5534^2 .

It is a cyclic number.

It is not a de Polignac number, because 255055517 - 2² = 255055513 is a prime.

Together with 255055519, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_13940693 and since 255055517 and 13940693 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255055513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127527758 + 127527759.

It is an arithmetic number, because the mean of its divisors is an integer number (127527759).

Almost surely, 2^255055517 is an apocalyptic number.

It is an amenable number.

255055517 is a deficient number, since it is larger than the sum of its proper divisors (1).

255055517 is an equidigital number, since it uses as much as digits as its factorization.

255055517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43750, while the sum is 35.

The square root of 255055517 is about 15970.4576327668. The cubic root of 255055517 is about 634.1785869873.

The spelling of 255055517 in words is "two hundred fifty-five million, fifty-five thousand, five hundred seventeen".