220240421425 has 24 divisors (see below), whose sum is σ = 275786819000. Its totient is φ = 174459847680.

The previous prime is 220240421417. The next prime is 220240421437. The reversal of 220240421425 is 524124042022.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 133611449841 + 86628971584 = 365529^2 + 294328^2 .

It is not a de Polignac number, because 220240421425 - 2³ = 220240421417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220240421393 and 220240421402.

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 23 ways as a sum of consecutive naturals, for example, 4194937 + ... + 4247113.

Almost surely, 2^220240421425 is an apocalyptic number.

220240421425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220240421425 is a deficient number, since it is larger than the sum of its proper divisors (55546397575).

220240421425 is a wasteful number, since it uses less digits than its factorization.

220240421425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53845 (or 53840 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

Adding to 220240421425 its reverse (524124042022), we get a palindrome (744364463447).

The spelling of 220240421425 in words is "two hundred twenty billion, two hundred forty million, four hundred twenty-one thousand, four hundred twenty-five".