13733221 has 2 divisors, whose sum is σ = 13733222. Its totient is φ = 13733220.

The previous prime is 13733207. The next prime is 13733227. The reversal of 13733221 is 12233731.

It is a happy number.

13733221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7230721 + 6502500 = 2689^2 + 2550^2 .

It is a cyclic number.

It is not a de Polignac number, because 13733221 - 2¹¹ = 13731173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13733192 and 13733201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13733227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6866610 + 6866611.

It is an arithmetic number, because the mean of its divisors is an integer number (6866611).

Almost surely, 2^13733221 is an apocalyptic number.

It is an amenable number.

13733221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13733221 is an equidigital number, since it uses as much as digits as its factorization.

13733221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 22.

The square root of 13733221 is about 3705.8360730070. The cubic root of 13733221 is about 239.4735044194.

Adding to 13733221 its reverse (12233731), we get a palindrome (25966952).

The spelling of 13733221 in words is "thirteen million, seven hundred thirty-three thousand, two hundred twenty-one".