620512211 has 4 divisors (see below), whose sum is σ = 676922424. Its totient is φ = 564102000.

The previous prime is 620512187. The next prime is 620512261. The reversal of 620512211 is 112215026.

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

It is a de Polignac number, because none of the positive numbers 2^k-620512211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (620512261) 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, 28205090 + ... + 28205111.

It is an arithmetic number, because the mean of its divisors is an integer number (169230606).

Almost surely, 2^620512211 is an apocalyptic number.

620512211 is a deficient number, since it is larger than the sum of its proper divisors (56410213).

620512211 is a wasteful number, since it uses less digits than its factorization.

620512211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56410212.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 620512211 is about 24910.0825169247. The cubic root of 620512211 is about 852.9366526671.

Adding to 620512211 its reverse (112215026), we get a palindrome (732727237).

The spelling of 620512211 in words is "six hundred twenty million, five hundred twelve thousand, two hundred eleven".