1520545513 has 2 divisors, whose sum is σ = 1520545514. Its totient is φ = 1520545512.

The previous prime is 1520545459. The next prime is 1520545517. The reversal of 1520545513 is 3155450251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1390767849 + 129777664 = 37293^2 + 11392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1520545513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1520545517) 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, 760272756 + 760272757.

It is an arithmetic number, because the mean of its divisors is an integer number (760272757).

Almost surely, 2^1520545513 is an apocalyptic number.

It is an amenable number.

1520545513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1520545513 is an equidigital number, since it uses as much as digits as its factorization.

1520545513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15000, while the sum is 31.

The square root of 1520545513 is about 38994.1728082543. The cubic root of 1520545513 is about 1149.9169474993.

Adding to 1520545513 its reverse (3155450251), we get a palindrome (4675995764).

The spelling of 1520545513 in words is "one billion, five hundred twenty million, five hundred forty-five thousand, five hundred thirteen".