13213641 has 16 divisors (see below), whose sum is σ = 21320064. Its totient is φ = 7106304.

The previous prime is 13213579. The next prime is 13213667. The reversal of 13213641 is 14631231.

It is not a de Polignac number, because 13213641 - 2⁹ = 13213129 is a prime.

It is a super-4 number, since 4×13213641⁴ (a number of 30 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (13213691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18150 + ... + 18863.

It is an arithmetic number, because the mean of its divisors is an integer number (1332504).

Almost surely, 2^13213641 is an apocalyptic number.

It is an amenable number.

13213641 is a deficient number, since it is larger than the sum of its proper divisors (8106423).

13213641 is a wasteful number, since it uses less digits than its factorization.

13213641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37040.

The product of its digits is 432, while the sum is 21.

The square root of 13213641 is about 3635.0572210077. The cubic root of 13213641 is about 236.4145316750.

Adding to 13213641 its reverse (14631231), we get a palindrome (27844872).

The spelling of 13213641 in words is "thirteen million, two hundred thirteen thousand, six hundred forty-one".