1005251222 has 4 divisors (see below), whose sum is σ = 1507876836. Its totient is φ = 502625610.

The previous prime is 1005251213. The next prime is 1005251227. The reversal of 1005251222 is 2221525001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 1005251194 and 1005251203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005251227) 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, 251312804 + ... + 251312807.

It is an arithmetic number, because the mean of its divisors is an integer number (376969209).

Almost surely, 2^1005251222 is an apocalyptic number.

1005251222 is a deficient number, since it is larger than the sum of its proper divisors (502625614).

1005251222 is an equidigital number, since it uses as much as digits as its factorization.

1005251222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502625613.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1005251222 is about 31705.6969959659. The cubic root of 1005251222 is about 1001.7473523149.

Adding to 1005251222 its reverse (2221525001), we get a palindrome (3226776223).

The spelling of 1005251222 in words is "one billion, five million, two hundred fifty-one thousand, two hundred twenty-two".