255513389 has 2 divisors, whose sum is σ = 255513390. Its totient is φ = 255513388.

The previous prime is 255513373. The next prime is 255513407. The reversal of 255513389 is 983315552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254657764 + 855625 = 15958^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 255513389 - 2⁴ = 255513373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255513289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127756694 + 127756695.

It is an arithmetic number, because the mean of its divisors is an integer number (127756695).

Almost surely, 2^255513389 is an apocalyptic number.

It is an amenable number.

255513389 is a deficient number, since it is larger than the sum of its proper divisors (1).

255513389 is an equidigital number, since it uses as much as digits as its factorization.

255513389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162000, while the sum is 41.

The square root of 255513389 is about 15984.7861731085. The cubic root of 255513389 is about 634.5578495585.

The spelling of 255513389 in words is "two hundred fifty-five million, five hundred thirteen thousand, three hundred eighty-nine".