13227381 has 20 divisors (see below), whose sum is σ = 20039052. Its totient is φ = 8693568.

The previous prime is 13227373. The next prime is 13227397. The reversal of 13227381 is 18372231.

It can be written as a sum of positive squares in 2 ways, for example, as 9090225 + 4137156 = 3015^2 + 2034^2 .

It is not a de Polignac number, because 13227381 - 2³ = 13227373 is a prime.

It is a super-2 number, since 2×13227381² = 349927216238322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13227311) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4795 + ... + 7031.

Almost surely, 2^13227381 is an apocalyptic number.

It is an amenable number.

13227381 is a deficient number, since it is larger than the sum of its proper divisors (6811671).

13227381 is an equidigital number, since it uses as much as digits as its factorization.

13227381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322 (or 2313 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 13227381 is about 3636.9466589435. The cubic root of 13227381 is about 236.4964472855.

The spelling of 13227381 in words is "thirteen million, two hundred twenty-seven thousand, three hundred eighty-one".