13221430 has 8 divisors (see below), whose sum is σ = 23798592. Its totient is φ = 5288568.

The previous prime is 13221421. The next prime is 13221431. The reversal of 13221430 is 3412231.

It is a happy number.

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

It is a super-2 number, since 2×13221430² = 349612422489800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221431) 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, 661062 + ... + 661081.

It is an arithmetic number, because the mean of its divisors is an integer number (2974824).

Almost surely, 2^13221430 is an apocalyptic number.

13221430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13221430 is a deficient number, since it is larger than the sum of its proper divisors (10577162).

13221430 is a wasteful number, since it uses less digits than its factorization.

13221430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322150.

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

The square root of 13221430 is about 3636.1284355754. The cubic root of 13221430 is about 236.4609753738.

Adding to 13221430 its reverse (3412231), we get a palindrome (16633661).

The spelling of 13221430 in words is "thirteen million, two hundred twenty-one thousand, four hundred thirty".