13530221245 has 4 divisors (see below), whose sum is σ = 16236265500. Its totient is φ = 10824176992.

The previous prime is 13530221231. The next prime is 13530221279. The reversal of 13530221245 is 54212203531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54212203531 = 1409 ⋅38475659.

It can be written as a sum of positive squares in 2 ways, for example, as 2478745369 + 11051475876 = 49787^2 + 105126^2 .

It is a cyclic number.

It is not a de Polignac number, because 13530221245 - 2⁹ = 13530220733 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1353022120 + ... + 1353022129.

It is an arithmetic number, because the mean of its divisors is an integer number (4059066375).

Almost surely, 2^13530221245 is an apocalyptic number.

It is an amenable number.

13530221245 is a deficient number, since it is larger than the sum of its proper divisors (2706044255).

13530221245 is an equidigital number, since it uses as much as digits as its factorization.

13530221245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2706044254.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 13530221245 its reverse (54212203531), we get a palindrome (67742424776).

The spelling of 13530221245 in words is "thirteen billion, five hundred thirty million, two hundred twenty-one thousand, two hundred forty-five".