13138522 has 8 divisors (see below), whose sum is σ = 19840500. Its totient is φ = 6525024.

The previous prime is 13138511. The next prime is 13138523. The reversal of 13138522 is 22583131.

13138522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12383361 + 755161 = 3519^2 + 869^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (13138523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21747 + ... + 22342.

Almost surely, 2^13138522 is an apocalyptic number.

13138522 is a deficient number, since it is larger than the sum of its proper divisors (6701978).

13138522 is a wasteful number, since it uses less digits than its factorization.

13138522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44240.

The product of its digits is 1440, while the sum is 25.

The square root of 13138522 is about 3624.7099194280. The cubic root of 13138522 is about 235.9656777626.

The spelling of 13138522 in words is "thirteen million, one hundred thirty-eight thousand, five hundred twenty-two".