255368521 has 2 divisors, whose sum is σ = 255368522. Its totient is φ = 255368520.

The previous prime is 255368497. The next prime is 255368549. The reversal of 255368521 is 125863552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236052496 + 19316025 = 15364^2 + 4395^2 .

It is a cyclic number.

It is not a de Polignac number, because 255368521 - 2⁵ = 255368489 is a prime.

It is not a weakly prime, because it can be changed into another prime (255348521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127684260 + 127684261.

It is an arithmetic number, because the mean of its divisors is an integer number (127684261).

Almost surely, 2^255368521 is an apocalyptic number.

It is an amenable number.

255368521 is a deficient number, since it is larger than the sum of its proper divisors (1).

255368521 is an equidigital number, since it uses as much as digits as its factorization.

255368521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 37.

The square root of 255368521 is about 15980.2540968534. The cubic root of 255368521 is about 634.4379021516.

The spelling of 255368521 in words is "two hundred fifty-five million, three hundred sixty-eight thousand, five hundred twenty-one".