64218433 has 2 divisors, whose sum is σ = 64218434. Its totient is φ = 64218432.

The previous prime is 64218431. The next prime is 64218463. The reversal of 64218433 is 33481246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38340864 + 25877569 = 6192^2 + 5087^2 .

It is a cyclic number.

It is not a de Polignac number, because 64218433 - 2¹ = 64218431 is a prime.

Together with 64218431, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 64218395 and 64218404.

It is not a weakly prime, because it can be changed into another prime (64218431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32109216 + 32109217.

It is an arithmetic number, because the mean of its divisors is an integer number (32109217).

Almost surely, 2^64218433 is an apocalyptic number.

It is an amenable number.

64218433 is a deficient number, since it is larger than the sum of its proper divisors (1).

64218433 is an equidigital number, since it uses as much as digits as its factorization.

64218433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 31.

The square root of 64218433 is about 8013.6404336606. The cubic root of 64218433 is about 400.4545520105.

Adding to 64218433 its reverse (33481246), we get a palindrome (97699679).

The spelling of 64218433 in words is "sixty-four million, two hundred eighteen thousand, four hundred thirty-three".