13644131 has 4 divisors (see below), whose sum is σ = 13690992. Its totient is φ = 13597272.

The previous prime is 13644107. The next prime is 13644133. The reversal of 13644131 is 13144631.

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

It is a cyclic number.

It is not a de Polignac number, because 13644131 - 2¹⁰ = 13643107 is a prime.

It is a super-2 number, since 2×13644131² = 372324621490322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13644097 and 13644106.

It is not an unprimeable number, because it can be changed into a prime (13644133) 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, 22991 + ... + 23576.

It is an arithmetic number, because the mean of its divisors is an integer number (3422748).

Almost surely, 2^13644131 is an apocalyptic number.

13644131 is a deficient number, since it is larger than the sum of its proper divisors (46861).

13644131 is an equidigital number, since it uses as much as digits as its factorization.

13644131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46860.

The product of its digits is 864, while the sum is 23.

The square root of 13644131 is about 3693.7962856660. The cubic root of 13644131 is about 238.9545439715.

Adding to 13644131 its reverse (13144631), we get a palindrome (26788762).

Subtracting from 13644131 its reverse (13144631), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 13644131 in words is "thirteen million, six hundred forty-four thousand, one hundred thirty-one".