1020516305 has 4 divisors (see below), whose sum is σ = 1224619572. Its totient is φ = 816413040.

The previous prime is 1020516271. The next prime is 1020516313. The reversal of 1020516305 is 5036150201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5036150201 = 163 ⋅30896627.

It can be written as a sum of positive squares in 2 ways, for example, as 739350481 + 281165824 = 27191^2 + 16768^2 .

It is not a de Polignac number, because 1020516305 - 2⁶ = 1020516241 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 102051626 + ... + 102051635.

It is an arithmetic number, because the mean of its divisors is an integer number (306154893).

Almost surely, 2^1020516305 is an apocalyptic number.

It is an amenable number.

1020516305 is a deficient number, since it is larger than the sum of its proper divisors (204103267).

1020516305 is an equidigital number, since it uses as much as digits as its factorization.

1020516305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204103266.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1020516305 is about 31945.5208910420. The cubic root of 1020516305 is about 1006.7925254657.

Adding to 1020516305 its reverse (5036150201), we get a palindrome (6056666506).

The spelling of 1020516305 in words is "one billion, twenty million, five hundred sixteen thousand, three hundred five".