1550966513 has 2 divisors, whose sum is σ = 1550966514. Its totient is φ = 1550966512.

The previous prime is 1550966503. The next prime is 1550966531. The reversal of 1550966513 is 3156690551.

1550966513 = 27847² + 27848².

It is a happy number.

Together with next prime (1550966531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 775511104 + 775455409 = 27848^2 + 27847^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550966513 - 2⁴ = 1550966497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1550966503) 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, 775483256 + 775483257.

It is an arithmetic number, because the mean of its divisors is an integer number (775483257).

Almost surely, 2^1550966513 is an apocalyptic number.

1550966513 is the 27848-th centered square number.

It is an amenable number.

1550966513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550966513 is an equidigital number, since it uses as much as digits as its factorization.

1550966513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121500, while the sum is 41.

The square root of 1550966513 is about 39382.3121845328. The cubic root of 1550966513 is about 1157.5350235629.

The spelling of 1550966513 in words is "one billion, five hundred fifty million, nine hundred sixty-six thousand, five hundred thirteen".