65525519 has 2 divisors, whose sum is σ = 65525520. Its totient is φ = 65525518.

The previous prime is 65525513. The next prime is 65525521. The reversal of 65525519 is 91552556.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65525519 - 2¹⁶ = 65459983 is a prime.

It is a super-2 number, since 2×65525519² = 8587187280438722, which contains 22 as substring.

Together with 65525521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65525513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32762759 + 32762760.

It is an arithmetic number, because the mean of its divisors is an integer number (32762760).

Almost surely, 2^65525519 is an apocalyptic number.

65525519 is a deficient number, since it is larger than the sum of its proper divisors (1).

65525519 is an equidigital number, since it uses as much as digits as its factorization.

65525519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67500, while the sum is 38.

The square root of 65525519 is about 8094.7834436753. The cubic root of 65525519 is about 403.1532419290.

The spelling of 65525519 in words is "sixty-five million, five hundred twenty-five thousand, five hundred nineteen".