65215019 has 2 divisors, whose sum is σ = 65215020. Its totient is φ = 65215018.

The previous prime is 65215013. The next prime is 65215021. The reversal of 65215019 is 91051256.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 65215019 - 2⁸ = 65214763 is a prime.

It is a super-2 number, since 2×65215019² = 8505997406340722, which contains 22 as substring.

Together with 65215021, 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 = 65214982 and 65215000.

It is not a weakly prime, because it can be changed into another prime (65215013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32607509 + 32607510.

It is an arithmetic number, because the mean of its divisors is an integer number (32607510).

Almost surely, 2^65215019 is an apocalyptic number.

65215019 is a deficient number, since it is larger than the sum of its proper divisors (1).

65215019 is an equidigital number, since it uses as much as digits as its factorization.

65215019 is an evil number, because the sum of its binary digits is even.

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

The square root of 65215019 is about 8075.5816508782. The cubic root of 65215019 is about 402.5154378555.

The spelling of 65215019 in words is "sixty-five million, two hundred fifteen thousand, nineteen".