147065221 has 2 divisors, whose sum is σ = 147065222. Its totient is φ = 147065220.

The previous prime is 147065207. The next prime is 147065227. The reversal of 147065221 is 122560741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125776225 + 21288996 = 11215^2 + 4614^2 .

It is an emirp because it is prime and its reverse (122560741) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147065221 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 147065221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147065227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73532610 + 73532611.

It is an arithmetic number, because the mean of its divisors is an integer number (73532611).

Almost surely, 2^147065221 is an apocalyptic number.

It is an amenable number.

147065221 is a deficient number, since it is larger than the sum of its proper divisors (1).

147065221 is an equidigital number, since it uses as much as digits as its factorization.

147065221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 147065221 is about 12127.0450234177. The cubic root of 147065221 is about 527.8412499578.

The spelling of 147065221 in words is "one hundred forty-seven million, sixty-five thousand, two hundred twenty-one".