1000221306 has 16 divisors (see below), whose sum is σ = 2286220224. Its totient is φ = 285777504.

The previous prime is 1000221251. The next prime is 1000221319. The reversal of 1000221306 is 6031220001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11907355 + ... + 11907438.

It is an arithmetic number, because the mean of its divisors is an integer number (142888764).

Almost surely, 2^1000221306 is an apocalyptic number.

1000221306 is an abundant number, since it is smaller than the sum of its proper divisors (1285998918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000221306 is a wasteful number, since it uses less digits than its factorization.

1000221306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23814805.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1000221306 is about 31626.2755632085. The cubic root of 1000221306 is about 1000.0737632255.

Adding to 1000221306 its reverse (6031220001), we get a palindrome (7031441307).

The spelling of 1000221306 in words is "one billion, two hundred twenty-one thousand, three hundred six".