2221654625 has 16 divisors (see below), whose sum is σ = 2810617680. Its totient is φ = 1752969600.

The previous prime is 2221654619. The next prime is 2221654691. The reversal of 2221654625 is 5264561222.

It can be written as a sum of positive squares in 8 ways, for example, as 1049824801 + 1171829824 = 32401^2 + 34232^2 .

It is not a de Polignac number, because 2221654625 - 2¹⁰ = 2221653601 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 112610 + ... + 130859.

It is an arithmetic number, because the mean of its divisors is an integer number (175663605).

Almost surely, 2^2221654625 is an apocalyptic number.

2221654625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2221654625 is a deficient number, since it is larger than the sum of its proper divisors (588963055).

2221654625 is an equidigital number, since it uses as much as digits as its factorization.

2221654625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243557 (or 243547 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

The square root of 2221654625 is about 47134.4314169589. The cubic root of 2221654625 is about 1304.8447675291.

The spelling of 2221654625 in words is "two billion, two hundred twenty-one million, six hundred fifty-four thousand, six hundred twenty-five".