13763221 has 4 divisors (see below), whose sum is σ = 13791744. Its totient is φ = 13734700.

The previous prime is 13763219. The next prime is 13763261. The reversal of 13763221 is 12236731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13763221 - 2¹ = 13763219 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 (13763261) 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, 13525 + ... + 14506.

It is an arithmetic number, because the mean of its divisors is an integer number (3447936).

Almost surely, 2^13763221 is an apocalyptic number.

It is an amenable number.

13763221 is a deficient number, since it is larger than the sum of its proper divisors (28523).

13763221 is an equidigital number, since it uses as much as digits as its factorization.

13763221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28522.

The product of its digits is 1512, while the sum is 25.

The square root of 13763221 is about 3709.8815344968. The cubic root of 13763221 is about 239.6477529372.

Adding to 13763221 its reverse (12236731), we get a palindrome (25999952).

The spelling of 13763221 in words is "thirteen million, seven hundred sixty-three thousand, two hundred twenty-one".