65431811 has 2 divisors, whose sum is σ = 65431812. Its totient is φ = 65431810.

The previous prime is 65431787. The next prime is 65431819. The reversal of 65431811 is 11813456.

65431811 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 65431811 - 2²² = 61237507 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65431819) 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, 32715905 + 32715906.

It is an arithmetic number, because the mean of its divisors is an integer number (32715906).

Almost surely, 2^65431811 is an apocalyptic number.

65431811 is a deficient number, since it is larger than the sum of its proper divisors (1).

65431811 is an equidigital number, since it uses as much as digits as its factorization.

65431811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 65431811 is about 8088.9932006400. The cubic root of 65431811 is about 402.9609671838.

The spelling of 65431811 in words is "sixty-five million, four hundred thirty-one thousand, eight hundred eleven".