13643155 has 4 divisors (see below), whose sum is σ = 16371792. Its totient is φ = 10914520.

The previous prime is 13643141. The next prime is 13643177. The reversal of 13643155 is 55134631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55134631 = 911 ⋅60521.

It is a de Polignac number, because none of the positive numbers 2^k-13643155 is a prime.

It is a super-2 number, since 2×13643155² = 372271356708050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 1364311 + ... + 1364320.

It is an arithmetic number, because the mean of its divisors is an integer number (4092948).

Almost surely, 2^13643155 is an apocalyptic number.

13643155 is a deficient number, since it is larger than the sum of its proper divisors (2728637).

13643155 is an equidigital number, since it uses as much as digits as its factorization.

13643155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728636.

The product of its digits is 5400, while the sum is 28.

The square root of 13643155 is about 3693.6641698996. The cubic root of 13643155 is about 238.9488461567.

Adding to 13643155 its reverse (55134631), we get a palindrome (68777786).

The spelling of 13643155 in words is "thirteen million, six hundred forty-three thousand, one hundred fifty-five".