13227981 has 32 divisors (see below), whose sum is σ = 19918080. Its totient is φ = 7755264.

The previous prime is 13227947. The next prime is 13227983. The reversal of 13227981 is 18972231.

It is not a de Polignac number, because 13227981 - 2¹⁹ = 12703693 is a prime.

It is a super-2 number, since 2×13227981² = 349958962672722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13227983) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128376 + ... + 128478.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^13227981 is an apocalyptic number.

It is an amenable number.

13227981 is a deficient number, since it is larger than the sum of its proper divisors (6690099).

13227981 is a wasteful number, since it uses less digits than its factorization.

13227981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245.

The product of its digits is 6048, while the sum is 33.

The square root of 13227981 is about 3637.0291447829. The cubic root of 13227981 is about 236.5000230934.

The spelling of 13227981 in words is "thirteen million, two hundred twenty-seven thousand, nine hundred eighty-one".