65915513 has 2 divisors, whose sum is σ = 65915514. Its totient is φ = 65915512.

The previous prime is 65915501. The next prime is 65915519. The reversal of 65915513 is 31551956.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56355049 + 9560464 = 7507^2 + 3092^2 .

It is a cyclic number.

It is not a de Polignac number, because 65915513 - 2¹⁴ = 65899129 is a prime.

It is not a weakly prime, because it can be changed into another prime (65915519) 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, 32957756 + 32957757.

It is an arithmetic number, because the mean of its divisors is an integer number (32957757).

Almost surely, 2^65915513 is an apocalyptic number.

It is an amenable number.

65915513 is a deficient number, since it is larger than the sum of its proper divisors (1).

65915513 is an equidigital number, since it uses as much as digits as its factorization.

65915513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20250, while the sum is 35.

The square root of 65915513 is about 8118.8369240920. The cubic root of 65915513 is about 403.9514879010.

The spelling of 65915513 in words is "sixty-five million, nine hundred fifteen thousand, five hundred thirteen".