2221122625 has 8 divisors (see below), whose sum is σ = 2771961192. Its totient is φ = 1776898000.

The previous prime is 2221122619. The next prime is 2221122661. The reversal of 2221122625 is 5262211222.

It can be written as a sum of positive squares in 4 ways, for example, as 519065089 + 1702057536 = 22783^2 + 41256^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2221122625 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 2221122625.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8884366 + ... + 8884615.

It is an arithmetic number, because the mean of its divisors is an integer number (346495149).

Almost surely, 2^2221122625 is an apocalyptic number.

2221122625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2221122625 is a deficient number, since it is larger than the sum of its proper divisors (550838567).

2221122625 is an equidigital number, since it uses as much as digits as its factorization.

2221122625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17768996 (or 17768986 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 2221122625 is about 47128.7876461935. The cubic root of 2221122625 is about 1304.7406059993.

Adding to 2221122625 its reverse (5262211222), we get a palindrome (7483333847).

The spelling of 2221122625 in words is "two billion, two hundred twenty-one million, one hundred twenty-two thousand, six hundred twenty-five".