7346544221 has 2 divisors, whose sum is σ = 7346544222. Its totient is φ = 7346544220.

The previous prime is 7346544209. The next prime is 7346544251. The reversal of 7346544221 is 1224456437.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6321840100 + 1024704121 = 79510^2 + 32011^2 .

It is an emirp because it is prime and its reverse (1224456437) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7346544221 is a prime.

It is a super-2 number, since 2×7346544221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7346544251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3673272110 + 3673272111.

It is an arithmetic number, because the mean of its divisors is an integer number (3673272111).

Almost surely, 2^7346544221 is an apocalyptic number.

It is an amenable number.

7346544221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7346544221 is an equidigital number, since it uses as much as digits as its factorization.

7346544221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 38.

The square root of 7346544221 is about 85711.9841154083. The cubic root of 7346544221 is about 1943.9915180419.

The spelling of 7346544221 in words is "seven billion, three hundred forty-six million, five hundred forty-four thousand, two hundred twenty-one".