4225520138449 has 27 divisors (see below), whose sum is σ = 4441596247569. Its totient is φ = 4019780600640.

The previous prime is 4225520138377. The next prime is 4225520138501. The reversal of 4225520138449 is 9448310255224.

The square root of 4225520138449 is 2055607.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 35851529025 + 4189668609424 = 189345^2 + 2046868^2 .

It is not a de Polignac number, because 4225520138449 - 2¹⁷ = 4225520007377 is a prime.

It is a super-2 number, since 2×4225520138449² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4225520138849) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4351719534 + ... + 4351720504.

Almost surely, 2^{4225520138449} is an apocalyptic number.

4225520138449 is the 2055607-th square number.

4225520138449 is the 1027804-th centered octagonal number.

It is an amenable number.

4225520138449 is a deficient number, since it is larger than the sum of its proper divisors (216076109120).

4225520138449 is an frugal number, since it uses more digits than its factorization.

4225520138449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146 (or 1073 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 49.

Multiplying 4225520138449 by its sum of digits (49), we get a square (207050486784001 = 14389249²).

The spelling of 4225520138449 in words is "four trillion, two hundred twenty-five billion, five hundred twenty million, one hundred thirty-eight thousand, four hundred forty-nine".