1522325221 has 2 divisors, whose sum is σ = 1522325222. Its totient is φ = 1522325220.

The previous prime is 1522325209. The next prime is 1522325237. The reversal of 1522325221 is 1225232251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1487644900 + 34680321 = 38570^2 + 5889^2 .

It is a cyclic number.

It is not a de Polignac number, because 1522325221 - 2⁹ = 1522324709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1522325621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761162610 + 761162611.

It is an arithmetic number, because the mean of its divisors is an integer number (761162611).

Almost surely, 2^1522325221 is an apocalyptic number.

It is an amenable number.

1522325221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522325221 is an equidigital number, since it uses as much as digits as its factorization.

1522325221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 1522325221 is about 39016.9863136557. The cubic root of 1522325221 is about 1150.3654090219.

Adding to 1522325221 its reverse (1225232251), we get a palindrome (2747557472).

The spelling of 1522325221 in words is "one billion, five hundred twenty-two million, three hundred twenty-five thousand, two hundred twenty-one".