65346221 has 2 divisors, whose sum is σ = 65346222. Its totient is φ = 65346220.

The previous prime is 65346179. The next prime is 65346223. The reversal of 65346221 is 12264356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64561225 + 784996 = 8035^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 65346221 - 2⁶ = 65346157 is a prime.

Together with 65346223, 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 (65346223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32673110 + 32673111.

It is an arithmetic number, because the mean of its divisors is an integer number (32673111).

Almost surely, 2^65346221 is an apocalyptic number.

It is an amenable number.

65346221 is a deficient number, since it is larger than the sum of its proper divisors (1).

65346221 is an equidigital number, since it uses as much as digits as its factorization.

65346221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 29.

The square root of 65346221 is about 8083.7009469673. The cubic root of 65346221 is about 402.7851888792.

The spelling of 65346221 in words is "sixty-five million, three hundred forty-six thousand, two hundred twenty-one".