22221002525 has 6 divisors (see below), whose sum is σ = 27554043162. Its totient is φ = 17776802000.

The previous prime is 22221002509. The next prime is 22221002579. The reversal of 22221002525 is 52520012222.

It can be written as a sum of positive squares in 3 ways, for example, as 140825689 + 22080176836 = 11867^2 + 148594^2 .

It is not a de Polignac number, because 22221002525 - 2⁴ = 22221002509 is a prime.

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 22221002525.

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 444420026 + ... + 444420075.

It is an arithmetic number, because the mean of its divisors is an integer number (4592340527).

Almost surely, 2^22221002525 is an apocalyptic number.

22221002525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22221002525 is a deficient number, since it is larger than the sum of its proper divisors (5333040637).

22221002525 is an equidigital number, since it uses as much as digits as its factorization.

22221002525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888840111 (or 888840106 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 22221002525 its reverse (52520012222), we get a palindrome (74741014747).

The spelling of 22221002525 in words is "twenty-two billion, two hundred twenty-one million, two thousand, five hundred twenty-five".