13732221 has 8 divisors (see below), whose sum is σ = 18416160. Its totient is φ = 9101552.

The previous prime is 13732211. The next prime is 13732237. The reversal of 13732221 is 12223731.

13732221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13732221 - 2⁹ = 13731709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13732211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12711 + ... + 13748.

It is an arithmetic number, because the mean of its divisors is an integer number (2302020).

Almost surely, 2^13732221 is an apocalyptic number.

It is an amenable number.

13732221 is a deficient number, since it is larger than the sum of its proper divisors (4683939).

13732221 is a wasteful number, since it uses less digits than its factorization.

13732221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26635.

The product of its digits is 504, while the sum is 21.

The square root of 13732221 is about 3705.7011482309. The cubic root of 13732221 is about 239.4676917671.

Adding to 13732221 its reverse (12223731), we get a palindrome (25955952).

The spelling of 13732221 in words is "thirteen million, seven hundred thirty-two thousand, two hundred twenty-one".