13530220525 has 12 divisors (see below), whose sum is σ = 17764384212. Its totient is φ = 10187459840.

The previous prime is 13530220493. The next prime is 13530220547. The reversal of 13530220525 is 52502203531.

It can be written as a sum of positive squares in 6 ways, for example, as 240281001 + 13289939524 = 15501^2 + 115282^2 .

It is not a de Polignac number, because 13530220525 - 2⁵ = 13530220493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13530220493 and 13530220502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15917482 + ... + 15918331.

It is an arithmetic number, because the mean of its divisors is an integer number (1480365351).

Almost surely, 2^13530220525 is an apocalyptic number.

It is an amenable number.

13530220525 is a deficient number, since it is larger than the sum of its proper divisors (4234163687).

13530220525 is a wasteful number, since it uses less digits than its factorization.

13530220525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31835840 (or 31835835 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 13530220525 in words is "thirteen billion, five hundred thirty million, two hundred twenty thousand, five hundred twenty-five".