64144219 has 2 divisors, whose sum is σ = 64144220. Its totient is φ = 64144218.

The previous prime is 64144207. The next prime is 64144343. The reversal of 64144219 is 91244146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64144219 - 2¹³ = 64136027 is a prime.

It is a super-2 number, since 2×64144219² = 8228961662239922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64144819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32072109 + 32072110.

It is an arithmetic number, because the mean of its divisors is an integer number (32072110).

Almost surely, 2^64144219 is an apocalyptic number.

64144219 is a deficient number, since it is larger than the sum of its proper divisors (1).

64144219 is an equidigital number, since it uses as much as digits as its factorization.

64144219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 64144219 is about 8009.0086153031. The cubic root of 64144219 is about 400.3002308472.

The spelling of 64144219 in words is "sixty-four million, one hundred forty-four thousand, two hundred nineteen".