64211321 has 2 divisors, whose sum is σ = 64211322. Its totient is φ = 64211320.

The previous prime is 64211299. The next prime is 64211351. The reversal of 64211321 is 12311246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63282025 + 929296 = 7955^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 64211321 - 2¹⁰ = 64210297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64211293 and 64211302.

It is not a weakly prime, because it can be changed into another prime (64211351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32105660 + 32105661.

It is an arithmetic number, because the mean of its divisors is an integer number (32105661).

Almost surely, 2^64211321 is an apocalyptic number.

It is an amenable number.

64211321 is a deficient number, since it is larger than the sum of its proper divisors (1).

64211321 is an equidigital number, since it uses as much as digits as its factorization.

64211321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 20.

The square root of 64211321 is about 8013.1966779806. The cubic root of 64211321 is about 400.4397684155.

Adding to 64211321 its reverse (12311246), we get a palindrome (76522567).

The spelling of 64211321 in words is "sixty-four million, two hundred eleven thousand, three hundred twenty-one".