64216247 has 2 divisors, whose sum is σ = 64216248. Its totient is φ = 64216246.

The previous prime is 64216199. The next prime is 64216261. The reversal of 64216247 is 74261246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64216247 - 2¹⁰ = 64215223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64218247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32108123 + 32108124.

It is an arithmetic number, because the mean of its divisors is an integer number (32108124).

Almost surely, 2^64216247 is an apocalyptic number.

64216247 is a deficient number, since it is larger than the sum of its proper divisors (1).

64216247 is an equidigital number, since it uses as much as digits as its factorization.

64216247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

The square root of 64216247 is about 8013.5040400564. The cubic root of 64216247 is about 400.4500081252.

The spelling of 64216247 in words is "sixty-four million, two hundred sixteen thousand, two hundred forty-seven".