255221089 has 2 divisors, whose sum is σ = 255221090. Its totient is φ = 255221088.

The previous prime is 255221081. The next prime is 255221101. The reversal of 255221089 is 980122552.

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., 151486864 + 103734225 = 12308^2 + 10185^2 .

It is a cyclic number.

It is not a de Polignac number, because 255221089 - 2³ = 255221081 is a prime.

It is not a weakly prime, because it can be changed into another prime (255221081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127610544 + 127610545.

It is an arithmetic number, because the mean of its divisors is an integer number (127610545).

Almost surely, 2^255221089 is an apocalyptic number.

It is an amenable number.

255221089 is a deficient number, since it is larger than the sum of its proper divisors (1).

255221089 is an equidigital number, since it uses as much as digits as its factorization.

255221089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 255221089 is about 15975.6404879429. The cubic root of 255221089 is about 634.3157852273.

The spelling of 255221089 in words is "two hundred fifty-five million, two hundred twenty-one thousand, eighty-nine".