13643212 has 24 divisors (see below), whose sum is σ = 26655552. Its totient is φ = 6056400.

The previous prime is 13643191. The next prime is 13643213. The reversal of 13643212 is 21234631.

It is a super-2 number, since 2×13643212² = 372274467353888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (13643213) 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 7 ways as a sum of consecutive naturals, for example, 1714 + ... + 5497.

It is an arithmetic number, because the mean of its divisors is an integer number (1110648).

Almost surely, 2^13643212 is an apocalyptic number.

It is an amenable number.

13643212 is a deficient number, since it is larger than the sum of its proper divisors (13012340).

13643212 is a wasteful number, since it uses less digits than its factorization.

13643212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7269 (or 7267 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 13643212 is about 3693.6718858069. The cubic root of 13643212 is about 238.9491789259.

Adding to 13643212 its reverse (21234631), we get a palindrome (34877843).

The spelling of 13643212 in words is "thirteen million, six hundred forty-three thousand, two hundred twelve".