4425131221425 has 18 divisors (see below), whose sum is σ = 7925901699222. Its totient is φ = 2360069984640.

The previous prime is 4425131221411. The next prime is 4425131221439. The reversal of 4425131221425 is 5241221315244.

4425131221425 is a `hidden beast` number, since 4 + 4 + 2 + 5 + 1 + 3 + 1 + 221 + 425 = 666.

It is an interprime number because it is at equal distance from previous prime (4425131221411) and next prime (4425131221439).

It can be written as a sum of positive squares in 3 ways, for example, as 1386025871616 + 3039105349809 = 1177296^2 + 1743303^2 .

It is not a de Polignac number, because 4425131221425 - 2⁷ = 4425131221297 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4425131221425.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9833624712 + ... + 9833625161.

It is an arithmetic number, because the mean of its divisors is an integer number (440327872179).

Almost surely, 2^{4425131221425} is an apocalyptic number.

4425131221425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4425131221425 is a deficient number, since it is larger than the sum of its proper divisors (3500770477797).

4425131221425 is a wasteful number, since it uses less digits than its factorization.

4425131221425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19667249889 (or 19667249881 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

Adding to 4425131221425 its reverse (5241221315244), we get a palindrome (9666352536669).

The spelling of 4425131221425 in words is "four trillion, four hundred twenty-five billion, one hundred thirty-one million, two hundred twenty-one thousand, four hundred twenty-five".