7245024221 has 2 divisors, whose sum is σ = 7245024222. Its totient is φ = 7245024220.

The previous prime is 7245024203. The next prime is 7245024247. The reversal of 7245024221 is 1224205427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5837724025 + 1407300196 = 76405^2 + 37514^2 .

It is an emirp because it is prime and its reverse (1224205427) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7245024221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7245020221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3622512110 + 3622512111.

It is an arithmetic number, because the mean of its divisors is an integer number (3622512111).

Almost surely, 2^7245024221 is an apocalyptic number.

It is an amenable number.

7245024221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7245024221 is an equidigital number, since it uses as much as digits as its factorization.

7245024221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 7245024221 is about 85117.7080342275. The cubic root of 7245024221 is about 1934.9954459538.

Adding to 7245024221 its reverse (1224205427), we get a palindrome (8469229648).

The spelling of 7245024221 in words is "seven billion, two hundred forty-five million, twenty-four thousand, two hundred twenty-one".