255631219 has 2 divisors, whose sum is σ = 255631220. Its totient is φ = 255631218.

The previous prime is 255631217. The next prime is 255631231. The reversal of 255631219 is 912136552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255631219 - 2¹ = 255631217 is a prime.

It is a super-2 number, since 2×255631219² = 130694640254851922, which contains 22 as substring.

Together with 255631217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (255631217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127815609 + 127815610.

It is an arithmetic number, because the mean of its divisors is an integer number (127815610).

Almost surely, 2^255631219 is an apocalyptic number.

255631219 is a deficient number, since it is larger than the sum of its proper divisors (1).

255631219 is an equidigital number, since it uses as much as digits as its factorization.

255631219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 34.

The square root of 255631219 is about 15988.4714403848. The cubic root of 255631219 is about 634.6553766864.

The spelling of 255631219 in words is "two hundred fifty-five million, six hundred thirty-one thousand, two hundred nineteen".