64312229 has 2 divisors, whose sum is σ = 64312230. Its totient is φ = 64312228.

The previous prime is 64312187. The next prime is 64312279. The reversal of 64312229 is 92221346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60871204 + 3441025 = 7802^2 + 1855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64312229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64312279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32156114 + 32156115.

It is an arithmetic number, because the mean of its divisors is an integer number (32156115).

Almost surely, 2^64312229 is an apocalyptic number.

It is an amenable number.

64312229 is a deficient number, since it is larger than the sum of its proper divisors (1).

64312229 is an equidigital number, since it uses as much as digits as its factorization.

64312229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 64312229 is about 8019.4905698554. The cubic root of 64312229 is about 400.6494221399.

The spelling of 64312229 in words is "sixty-four million, three hundred twelve thousand, two hundred twenty-nine".