65415191 has 2 divisors, whose sum is σ = 65415192. Its totient is φ = 65415190.

The previous prime is 65415187. The next prime is 65415193. The reversal of 65415191 is 19151456.

65415191 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 65415191 - 2² = 65415187 is a prime.

Together with 65415193, 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 (65415193) 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, 32707595 + 32707596.

It is an arithmetic number, because the mean of its divisors is an integer number (32707596).

Almost surely, 2^65415191 is an apocalyptic number.

65415191 is a deficient number, since it is larger than the sum of its proper divisors (1).

65415191 is an equidigital number, since it uses as much as digits as its factorization.

65415191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 65415191 is about 8087.9658134787. The cubic root of 65415191 is about 402.9268462759.

The spelling of 65415191 in words is "sixty-five million, four hundred fifteen thousand, one hundred ninety-one".