65421311 has 2 divisors, whose sum is σ = 65421312. Its totient is φ = 65421310.

The previous prime is 65421299. The next prime is 65421329. The reversal of 65421311 is 11312456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65421311 - 2⁶ = 65421247 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65421211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32710655 + 32710656.

It is an arithmetic number, because the mean of its divisors is an integer number (32710656).

Almost surely, 2^65421311 is an apocalyptic number.

65421311 is a deficient number, since it is larger than the sum of its proper divisors (1).

65421311 is an equidigital number, since it uses as much as digits as its factorization.

65421311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 23.

The square root of 65421311 is about 8088.3441445082. The cubic root of 65421311 is about 402.9394113257.

Adding to 65421311 its reverse (11312456), we get a palindrome (76733767).

The spelling of 65421311 in words is "sixty-five million, four hundred twenty-one thousand, three hundred eleven".