13430221 has 8 divisors (see below), whose sum is σ = 16251840. Its totient is φ = 10834368.

The previous prime is 13430213. The next prime is 13430227. The reversal of 13430221 is 12203431.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13430221 - 2³ = 13430213 is a prime.

It is a super-2 number, since 2×13430221² = 360741672217682, 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 = 13430195 and 13430204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13430227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56311 + ... + 56548.

It is an arithmetic number, because the mean of its divisors is an integer number (2031480).

Almost surely, 2^13430221 is an apocalyptic number.

It is an amenable number.

13430221 is a deficient number, since it is larger than the sum of its proper divisors (2821619).

13430221 is a wasteful number, since it uses less digits than its factorization.

13430221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112883.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13430221 is about 3664.7265928033. The cubic root of 13430221 is about 237.6991998209.

Adding to 13430221 its reverse (12203431), we get a palindrome (25633652).

The spelling of 13430221 in words is "thirteen million, four hundred thirty thousand, two hundred twenty-one".