620222544209 has 2 divisors, whose sum is σ = 620222544210. Its totient is φ = 620222544208.

The previous prime is 620222544191. The next prime is 620222544217. The reversal of 620222544209 is 902445222026.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319428432400 + 300794111809 = 565180^2 + 548447^2 .

It is a cyclic number.

It is not a de Polignac number, because 620222544209 - 2²⁴ = 620205766993 is a prime.

It is a super-3 number, since 3×620222544209³ (a number of 36 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (620222544259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310111272104 + 310111272105.

It is an arithmetic number, because the mean of its divisors is an integer number (310111272105).

Almost surely, 2^620222544209 is an apocalyptic number.

It is an amenable number.

620222544209 is a deficient number, since it is larger than the sum of its proper divisors (1).

620222544209 is an equidigital number, since it uses as much as digits as its factorization.

620222544209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 620222544209 in words is "six hundred twenty billion, two hundred twenty-two million, five hundred forty-four thousand, two hundred nine".