13530221225 has 24 divisors (see below), whose sum is σ = 16926916608. Its totient is φ = 10727942400.

The previous prime is 13530221167. The next prime is 13530221231. The reversal of 13530221225 is 52212203531.

It is a happy number.

It is not a de Polignac number, because 13530221225 - 2¹⁴ = 13530204841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13530221194 and 13530221203.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4668977 + ... + 4671873.

It is an arithmetic number, because the mean of its divisors is an integer number (705288192).

Almost surely, 2^13530221225 is an apocalyptic number.

It is an amenable number.

13530221225 is a deficient number, since it is larger than the sum of its proper divisors (3396695383).

13530221225 is a wasteful number, since it uses less digits than its factorization.

13530221225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505 (or 4500 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 13530221225 its reverse (52212203531), we get a palindrome (65742424756).

The spelling of 13530221225 in words is "thirteen billion, five hundred thirty million, two hundred twenty-one thousand, two hundred twenty-five".