13800221 has 2 divisors, whose sum is σ = 13800222. Its totient is φ = 13800220.

The previous prime is 13800217. The next prime is 13800307. The reversal of 13800221 is 12200831.

13800221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12348196 + 1452025 = 3514^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 13800221 - 2² = 13800217 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13800221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13800211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6900110 + 6900111.

It is an arithmetic number, because the mean of its divisors is an integer number (6900111).

Almost surely, 2^13800221 is an apocalyptic number.

It is an amenable number.

13800221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13800221 is an equidigital number, since it uses as much as digits as its factorization.

13800221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 13800221 is about 3714.8648696823. The cubic root of 13800221 is about 239.8623110687.

The spelling of 13800221 in words is "thirteen million, eight hundred thousand, two hundred twenty-one".