2221031312 has 20 divisors (see below), whose sum is σ = 4351602060. Its totient is φ = 1098037248.

The previous prime is 2221031311. The next prime is 2221031327. The reversal of 2221031312 is 2131301222.

It can be written as a sum of positive squares in 2 ways, for example, as 1520688016 + 700343296 = 38996^2 + 26464^2 .

It is not an unprimeable number, because it can be changed into a prime (2221031311) 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 in 3 ways as a sum of consecutive naturals, for example, 778433 + ... + 781280.

It is an arithmetic number, because the mean of its divisors is an integer number (217580103).

Almost surely, 2^2221031312 is an apocalyptic number.

It is an amenable number.

2221031312 is a deficient number, since it is larger than the sum of its proper divisors (2130570748).

2221031312 is a wasteful number, since it uses less digits than its factorization.

2221031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559810 (or 1559804 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2221031312 is about 47127.8188759039. The cubic root of 2221031312 is about 1304.7227259401.

Adding to 2221031312 its reverse (2131301222), we get a palindrome (4352332534).

The spelling of 2221031312 in words is "two billion, two hundred twenty-one million, thirty-one thousand, three hundred twelve".