255221251 has 2 divisors, whose sum is σ = 255221252. Its totient is φ = 255221250.

The previous prime is 255221237. The next prime is 255221279. The reversal of 255221251 is 152122552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255221251 - 2⁷ = 255221123 is a prime.

It is not a weakly prime, because it can be changed into another prime (255221231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127610625 + 127610626.

It is an arithmetic number, because the mean of its divisors is an integer number (127610626).

Almost surely, 2^255221251 is an apocalyptic number.

255221251 is a deficient number, since it is larger than the sum of its proper divisors (1).

255221251 is an equidigital number, since it uses as much as digits as its factorization.

255221251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000, while the sum is 25.

The square root of 255221251 is about 15975.6455581613. The cubic root of 255221251 is about 634.3159194366.

The spelling of 255221251 in words is "two hundred fifty-five million, two hundred twenty-one thousand, two hundred fifty-one".