255242249 has 2 divisors, whose sum is σ = 255242250. Its totient is φ = 255242248.

The previous prime is 255242213. The next prime is 255242263. The reversal of 255242249 is 942242552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254977024 + 265225 = 15968^2 + 515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255242249 is a prime.

It is not a weakly prime, because it can be changed into another prime (255242749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127621124 + 127621125.

It is an arithmetic number, because the mean of its divisors is an integer number (127621125).

Almost surely, 2^255242249 is an apocalyptic number.

It is an amenable number.

255242249 is a deficient number, since it is larger than the sum of its proper divisors (1).

255242249 is an equidigital number, since it uses as much as digits as its factorization.

255242249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 35.

The square root of 255242249 is about 15976.3027324848. The cubic root of 255242249 is about 634.3333148016. Note that the first 4 decimals are identical.

The spelling of 255242249 in words is "two hundred fifty-five million, two hundred forty-two thousand, two hundred forty-nine".