13501381 has 4 divisors (see below), whose sum is σ = 14212000. Its totient is φ = 12790764.

The previous prime is 13501357. The next prime is 13501387. The reversal of 13501381 is 18310531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18310531 = 277 ⋅66103.

It is a cyclic number.

It is not a de Polignac number, because 13501381 - 2⁹ = 13500869 is a prime.

It is a super-2 number, since 2×13501381² = 364574577814322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13501387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355281 + ... + 355318.

It is an arithmetic number, because the mean of its divisors is an integer number (3553000).

Almost surely, 2^13501381 is an apocalyptic number.

It is an amenable number.

13501381 is a deficient number, since it is larger than the sum of its proper divisors (710619).

13501381 is an equidigital number, since it uses as much as digits as its factorization.

13501381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710618.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 13501381 is about 3674.4225396652. The cubic root of 13501381 is about 238.1182767808.

The spelling of 13501381 in words is "thirteen million, five hundred one thousand, three hundred eighty-one".