641414221 has 4 divisors (see below), whose sum is σ = 733044832. Its totient is φ = 549783612.

The previous prime is 641414219. The next prime is 641414227. The reversal of 641414221 is 122414146.

641414221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 641414221 - 2¹ = 641414219 is a prime.

It is a super-2 number, since 2×641414221² = 822824405802073682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641414227) 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, 45815295 + ... + 45815308.

It is an arithmetic number, because the mean of its divisors is an integer number (183261208).

Almost surely, 2^641414221 is an apocalyptic number.

It is an amenable number.

641414221 is a deficient number, since it is larger than the sum of its proper divisors (91630611).

641414221 is an equidigital number, since it uses as much as digits as its factorization.

641414221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91630610.

The product of its digits is 1536, while the sum is 25.

The square root of 641414221 is about 25326.1568541301. The cubic root of 641414221 is about 862.4081687849.

Adding to 641414221 its reverse (122414146), we get a palindrome (763828367).

The spelling of 641414221 in words is "six hundred forty-one million, four hundred fourteen thousand, two hundred twenty-one".