4421516225 has 36 divisors (see below), whose sum is σ = 6394426668. Its totient is φ = 3024000000.

The previous prime is 4421516189. The next prime is 4421516257. The reversal of 4421516225 is 5226151244.

It can be written as a sum of positive squares in 6 ways, for example, as 2989441 + 4418526784 = 1729^2 + 66472^2 .

It is not a de Polignac number, because 4421516225 - 2²² = 4417321921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4421516191 and 4421516200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 486725 + ... + 495725.

It is an arithmetic number, because the mean of its divisors is an integer number (177622963).

Almost surely, 2^4421516225 is an apocalyptic number.

It is an amenable number.

4421516225 is a deficient number, since it is larger than the sum of its proper divisors (1972910443).

4421516225 is a wasteful number, since it uses less digits than its factorization.

4421516225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9426 (or 9414 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 4421516225 is about 66494.4826658573. The cubic root of 4421516225 is about 1641.3092144640.

Adding to 4421516225 its reverse (5226151244), we get a palindrome (9647667469).

The spelling of 4421516225 in words is "four billion, four hundred twenty-one million, five hundred sixteen thousand, two hundred twenty-five".