255718513 has 2 divisors, whose sum is σ = 255718514. Its totient is φ = 255718512.

The previous prime is 255718457. The next prime is 255718523. The reversal of 255718513 is 315817552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213364449 + 42354064 = 14607^2 + 6508^2 .

It is a cyclic number.

It is not a de Polignac number, because 255718513 - 2¹³ = 255710321 is a prime.

It is not a weakly prime, because it can be changed into another prime (255718523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127859256 + 127859257.

It is an arithmetic number, because the mean of its divisors is an integer number (127859257).

Almost surely, 2^255718513 is an apocalyptic number.

It is an amenable number.

255718513 is a deficient number, since it is larger than the sum of its proper divisors (1).

255718513 is an equidigital number, since it uses as much as digits as its factorization.

255718513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 37.

The square root of 255718513 is about 15991.2011118615. The cubic root of 255718513 is about 634.7276100409.

The spelling of 255718513 in words is "two hundred fifty-five million, seven hundred eighteen thousand, five hundred thirteen".