13552381 has 4 divisors (see below), whose sum is σ = 13605372. Its totient is φ = 13499392.

The previous prime is 13552373. The next prime is 13552391. The reversal of 13552381 is 18325531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9205156 + 4347225 = 3034^2 + 2085^2 .

It is a cyclic number.

It is not a de Polignac number, because 13552381 - 2³ = 13552373 is a prime.

It is a super-2 number, since 2×13552381² = 367334061538322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13552321) 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, 26110 + ... + 26623.

It is an arithmetic number, because the mean of its divisors is an integer number (3401343).

Almost surely, 2^13552381 is an apocalyptic number.

It is an amenable number.

13552381 is a deficient number, since it is larger than the sum of its proper divisors (52991).

13552381 is an equidigital number, since it uses as much as digits as its factorization.

13552381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52990.

The product of its digits is 3600, while the sum is 28.

The square root of 13552381 is about 3681.3558643522. The cubic root of 13552381 is about 238.4177220302.

The spelling of 13552381 in words is "thirteen million, five hundred fifty-two thousand, three hundred eighty-one".