13133385 has 12 divisors (see below), whose sum is σ = 22764612. Its totient is φ = 7004448.

The previous prime is 13133383. The next prime is 13133411. The reversal of 13133385 is 58333131.

It can be written as a sum of positive squares in 2 ways, for example, as 4717584 + 8415801 = 2172^2 + 2901^2 .

It is not a de Polignac number, because 13133385 - 2¹ = 13133383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13133383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145882 + ... + 145971.

It is an arithmetic number, because the mean of its divisors is an integer number (1897051).

Almost surely, 2^13133385 is an apocalyptic number.

13133385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13133385 is a deficient number, since it is larger than the sum of its proper divisors (9631227).

13133385 is a wasteful number, since it uses less digits than its factorization.

13133385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291864 (or 291861 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 13133385 is about 3624.0012417216. The cubic root of 13133385 is about 235.9349205308.

The spelling of 13133385 in words is "thirteen million, one hundred thirty-three thousand, three hundred eighty-five".