13538225 has 6 divisors (see below), whose sum is σ = 16787430. Its totient is φ = 10830560.

The previous prime is 13538197. The next prime is 13538233. The reversal of 13538225 is 52283531.

It can be written as a sum of positive squares in 3 ways, for example, as 1420864 + 12117361 = 1192^2 + 3481^2 .

It is not a de Polignac number, because 13538225 - 2¹⁶ = 13472689 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 270740 + ... + 270789.

It is an arithmetic number, because the mean of its divisors is an integer number (2797905).

Almost surely, 2^13538225 is an apocalyptic number.

It is an amenable number.

13538225 is a deficient number, since it is larger than the sum of its proper divisors (3249205).

13538225 is an equidigital number, since it uses as much as digits as its factorization.

13538225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541539 (or 541534 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 13538225 is about 3679.4327008385. The cubic root of 13538225 is about 238.3346808515.

The spelling of 13538225 in words is "thirteen million, five hundred thirty-eight thousand, two hundred twenty-five".