13700221 has 2 divisors, whose sum is σ = 13700222. Its totient is φ = 13700220.

The previous prime is 13700201. The next prime is 13700243. The reversal of 13700221 is 12200731.

It is a happy number.

13700221 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., 8637721 + 5062500 = 2939^2 + 2250^2 .

It is a cyclic number.

It is not a de Polignac number, because 13700221 - 2⁵ = 13700189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13700195 and 13700204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13700201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6850110 + 6850111.

It is an arithmetic number, because the mean of its divisors is an integer number (6850111).

Almost surely, 2^13700221 is an apocalyptic number.

It is an amenable number.

13700221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13700221 is an equidigital number, since it uses as much as digits as its factorization.

13700221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 13700221 is about 3701.3809585072. The cubic root of 13700221 is about 239.2815377052.

Adding to 13700221 its reverse (12200731), we get a palindrome (25900952).

The spelling of 13700221 in words is "thirteen million, seven hundred thousand, two hundred twenty-one".