7347200221 has 2 divisors, whose sum is σ = 7347200222. Its totient is φ = 7347200220.

The previous prime is 7347200219. The next prime is 7347200239. The reversal of 7347200221 is 1220027437.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6766872121 + 580328100 = 82261^2 + 24090^2 .

It is an emirp because it is prime and its reverse (1220027437) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7347200221 - 2¹ = 7347200219 is a prime.

Together with 7347200219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7347200221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7347200251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3673600110 + 3673600111.

It is an arithmetic number, because the mean of its divisors is an integer number (3673600111).

Almost surely, 2^7347200221 is an apocalyptic number.

It is an amenable number.

7347200221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7347200221 is an equidigital number, since it uses as much as digits as its factorization.

7347200221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 7347200221 is about 85715.8107994085. The cubic root of 7347200221 is about 1944.0493783747.

Adding to 7347200221 its reverse (1220027437), we get a palindrome (8567227658).

The spelling of 7347200221 in words is "seven billion, three hundred forty-seven million, two hundred thousand, two hundred twenty-one".