65000221321309 has 4 divisors (see below), whose sum is σ = 65000333219004. Its totient is φ = 65000109423616.

The previous prime is 65000221321307. The next prime is 65000221321367. The reversal of 65000221321309 is 90312312200056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5245002298809 + 59755219022500 = 2290197^2 + 7730150^2 .

It is a cyclic number.

It is not a de Polignac number, because 65000221321309 - 2¹ = 65000221321307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65000221321307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55072942 + ... + 56240815.

It is an arithmetic number, because the mean of its divisors is an integer number (16250083304751).

Almost surely, 2^{65000221321309} is an apocalyptic number.

It is an amenable number.

65000221321309 is a deficient number, since it is larger than the sum of its proper divisors (111897695).

65000221321309 is a wasteful number, since it uses less digits than its factorization.

65000221321309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111897694.

The product of its (nonzero) digits is 19440, while the sum is 34.

The spelling of 65000221321309 in words is "sixty-five trillion, two hundred twenty-one million, three hundred twenty-one thousand, three hundred nine".