13138311 has 4 divisors (see below), whose sum is σ = 17517752. Its totient is φ = 8758872.

The previous prime is 13138309. The next prime is 13138339. The reversal of 13138311 is 11383131.

13138311 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11383131 = 3 ⋅3794377.

It is not a de Polignac number, because 13138311 - 2¹ = 13138309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138381) 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, 2189716 + ... + 2189721.

It is an arithmetic number, because the mean of its divisors is an integer number (4379438).

Almost surely, 2^13138311 is an apocalyptic number.

13138311 is a deficient number, since it is larger than the sum of its proper divisors (4379441).

13138311 is an equidigital number, since it uses as much as digits as its factorization.

13138311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4379440.

The product of its digits is 216, while the sum is 21.

The square root of 13138311 is about 3624.6808135338. The cubic root of 13138311 is about 235.9644145809.

The spelling of 13138311 in words is "thirteen million, one hundred thirty-eight thousand, three hundred eleven".