621612211 has 12 divisors (see below), whose sum is σ = 691919200. Its totient is φ = 557940240.

The previous prime is 621612197. The next prime is 621612239. The reversal of 621612211 is 112216126.

It is not a de Polignac number, because 621612211 - 2⁹ = 621611699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (621612611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22956 + ... + 42073.

Almost surely, 2^621612211 is an apocalyptic number.

621612211 is a deficient number, since it is larger than the sum of its proper divisors (70306989).

621612211 is a wasteful number, since it uses less digits than its factorization.

621612211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65130 (or 65119 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 621612211 is about 24932.1521533942. The cubic root of 621612211 is about 853.4403636536.

Adding to 621612211 its reverse (112216126), we get a palindrome (733828337).

The spelling of 621612211 in words is "six hundred twenty-one million, six hundred twelve thousand, two hundred eleven".