13413303221 has 4 divisors (see below), whose sum is σ = 13423458444. Its totient is φ = 13403148000.

The previous prime is 13413303209. The next prime is 13413303259. The reversal of 13413303221 is 12230331431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7312131121 + 6101172100 = 85511^2 + 78110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13413303221 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 (13413303121) 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, 5075630 + ... + 5078271.

It is an arithmetic number, because the mean of its divisors is an integer number (3355864611).

Almost surely, 2^13413303221 is an apocalyptic number.

It is an amenable number.

13413303221 is a deficient number, since it is larger than the sum of its proper divisors (10155223).

13413303221 is a wasteful number, since it uses less digits than its factorization.

13413303221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10155222.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 13413303221 its reverse (12230331431), we get a palindrome (25643634652).

The spelling of 13413303221 in words is "thirteen billion, four hundred thirteen million, three hundred three thousand, two hundred twenty-one".