65021519 has 2 divisors, whose sum is σ = 65021520. Its totient is φ = 65021518.

The previous prime is 65021501. The next prime is 65021521. The reversal of 65021519 is 91512056.

65021519 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65021519 - 2¹² = 65017423 is a prime.

It is a super-2 number, since 2×65021519² = 8455595866134722, which contains 22 as substring.

Together with 65021521, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 65021491 and 65021500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65021569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32510759 + 32510760.

It is an arithmetic number, because the mean of its divisors is an integer number (32510760).

Almost surely, 2^65021519 is an apocalyptic number.

65021519 is a deficient number, since it is larger than the sum of its proper divisors (1).

65021519 is an equidigital number, since it uses as much as digits as its factorization.

65021519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 29.

The square root of 65021519 is about 8063.5921895890. The cubic root of 65021519 is about 402.1169412186.

The spelling of 65021519 in words is "sixty-five million, twenty-one thousand, five hundred nineteen".