1005221255 has 8 divisors (see below), whose sum is σ = 1208133792. Its totient is φ = 802931488.

The previous prime is 1005221227. The next prime is 1005221281. The reversal of 1005221255 is 5521225001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1005221255 - 2²⁶ = 938112391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1005221255.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 152132 + ... + 158601.

It is an arithmetic number, because the mean of its divisors is an integer number (151016724).

Almost surely, 2^1005221255 is an apocalyptic number.

1005221255 is a deficient number, since it is larger than the sum of its proper divisors (202912537).

1005221255 is an equidigital number, since it uses as much as digits as its factorization.

1005221255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311385.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 1005221255 is about 31705.2244117590. The cubic root of 1005221255 is about 1001.7373980333.

Adding to 1005221255 its reverse (5521225001), we get a palindrome (6526446256).

The spelling of 1005221255 in words is "one billion, five million, two hundred twenty-one thousand, two hundred fifty-five".