13435221 has 8 divisors (see below), whose sum is σ = 18330400. Its totient is φ = 8748432.

The previous prime is 13435211. The next prime is 13435267. The reversal of 13435221 is 12253431.

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

It is not a de Polignac number, because 13435221 - 2¹⁵ = 13402453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13435211) 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, 51946 + ... + 52203.

It is an arithmetic number, because the mean of its divisors is an integer number (2291300).

Almost surely, 2^13435221 is an apocalyptic number.

It is an amenable number.

13435221 is a deficient number, since it is larger than the sum of its proper divisors (4895179).

13435221 is a wasteful number, since it uses less digits than its factorization.

13435221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104195.

The product of its digits is 720, while the sum is 21.

The square root of 13435221 is about 3665.4087084526. The cubic root of 13435221 is about 237.7286942112.

Adding to 13435221 its reverse (12253431), we get a palindrome (25688652).

The spelling of 13435221 in words is "thirteen million, four hundred thirty-five thousand, two hundred twenty-one".