620225213 has 2 divisors, whose sum is σ = 620225214. Its totient is φ = 620225212.

The previous prime is 620225209. The next prime is 620225299. The reversal of 620225213 is 312522026.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 617671609 + 2553604 = 24853^2 + 1598^2 .

It is a cyclic number.

It is not a de Polignac number, because 620225213 - 2² = 620225209 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (620215213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310112606 + 310112607.

It is an arithmetic number, because the mean of its divisors is an integer number (310112607).

Almost surely, 2^620225213 is an apocalyptic number.

It is an amenable number.

620225213 is a deficient number, since it is larger than the sum of its proper divisors (1).

620225213 is an equidigital number, since it uses as much as digits as its factorization.

620225213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 620225213 is about 24904.3211712345. The cubic root of 620225213 is about 852.8051329006.

Adding to 620225213 its reverse (312522026), we get a palindrome (932747239).

The spelling of 620225213 in words is "six hundred twenty million, two hundred twenty-five thousand, two hundred thirteen".