1522165649 has 2 divisors, whose sum is σ = 1522165650. Its totient is φ = 1522165648.

The previous prime is 1522165597. The next prime is 1522165651. The reversal of 1522165649 is 9465612251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1064847424 + 457318225 = 32632^2 + 21385^2 .

It is a cyclic number.

It is not a de Polignac number, because 1522165649 - 2²⁸ = 1253730193 is a prime.

It is a Sophie Germain prime.

Together with 1522165651, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1522165679) 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, 761082824 + 761082825.

It is an arithmetic number, because the mean of its divisors is an integer number (761082825).

Almost surely, 2^1522165649 is an apocalyptic number.

It is an amenable number.

1522165649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1522165649 is an equidigital number, since it uses as much as digits as its factorization.

1522165649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 41.

The square root of 1522165649 is about 39014.9413558447. The cubic root of 1522165649 is about 1150.3252133789.

The spelling of 1522165649 in words is "one billion, five hundred twenty-two million, one hundred sixty-five thousand, six hundred forty-nine".