65520319 has 2 divisors, whose sum is σ = 65520320. Its totient is φ = 65520318.

The previous prime is 65520317. The next prime is 65520331. The reversal of 65520319 is 91302556.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65520319 - 2¹ = 65520317 is a prime.

It is a super-2 number, since 2×65520319² = 8585824403723522, which contains 22 as substring.

Together with 65520317, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65520317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32760159 + 32760160.

It is an arithmetic number, because the mean of its divisors is an integer number (32760160).

Almost surely, 2^65520319 is an apocalyptic number.

65520319 is a deficient number, since it is larger than the sum of its proper divisors (1).

65520319 is an equidigital number, since it uses as much as digits as its factorization.

65520319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 65520319 is about 8094.4622427929. The cubic root of 65520319 is about 403.1425771155.

The spelling of 65520319 in words is "sixty-five million, five hundred twenty thousand, three hundred nineteen".