13634221 has 8 divisors (see below), whose sum is σ = 14485824. Its totient is φ = 12788160.

The previous prime is 13634219. The next prime is 13634237. The reversal of 13634221 is 12243631.

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 13634221 - 2¹ = 13634219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13634192 and 13634201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13634521) 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, 4416 + ... + 6838.

It is an arithmetic number, because the mean of its divisors is an integer number (1810728).

Almost surely, 2^13634221 is an apocalyptic number.

It is an amenable number.

13634221 is a deficient number, since it is larger than the sum of its proper divisors (851603).

13634221 is a wasteful number, since it uses less digits than its factorization.

13634221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

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

The square root of 13634221 is about 3692.4546036478. The cubic root of 13634221 is about 238.8966775018.

Adding to 13634221 its reverse (12243631), we get a palindrome (25877852).

The spelling of 13634221 in words is "thirteen million, six hundred thirty-four thousand, two hundred twenty-one".