7345305221 has 2 divisors, whose sum is σ = 7345305222. Its totient is φ = 7345305220.

The previous prime is 7345305197. The next prime is 7345305239. The reversal of 7345305221 is 1225035437.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6991300996 + 354004225 = 83614^2 + 18815^2 .

It is a cyclic number.

It is not a de Polignac number, because 7345305221 - 2²⁶ = 7278196357 is a prime.

It is a super-4 number, since 4×7345305221⁴ (a number of 41 digits) contains 4444 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7345305421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3672652610 + 3672652611.

It is an arithmetic number, because the mean of its divisors is an integer number (3672652611).

Almost surely, 2^7345305221 is an apocalyptic number.

It is an amenable number.

7345305221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7345305221 is an equidigital number, since it uses as much as digits as its factorization.

7345305221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 7345305221 is about 85704.7561165657. The cubic root of 7345305221 is about 1943.8822267055.

The spelling of 7345305221 in words is "seven billion, three hundred forty-five million, three hundred five thousand, two hundred twenty-one".