641222422 has 16 divisors (see below), whose sum is σ = 1053531360. Its totient is φ = 291346048.

The previous prime is 641222419. The next prime is 641222441. The reversal of 641222422 is 224222146.

It is a super-2 number, since 2×641222422² = 822332388951092168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 324178 + ... + 326149.

It is an arithmetic number, because the mean of its divisors is an integer number (65845710).

Almost surely, 2^641222422 is an apocalyptic number.

641222422 is a deficient number, since it is larger than the sum of its proper divisors (412308938).

641222422 is a wasteful number, since it uses less digits than its factorization.

641222422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650375.

The product of its digits is 3072, while the sum is 25.

The square root of 641222422 is about 25322.3699917681. The cubic root of 641222422 is about 862.3221996307.

Adding to 641222422 its reverse (224222146), we get a palindrome (865444568).

The spelling of 641222422 in words is "six hundred forty-one million, two hundred twenty-two thousand, four hundred twenty-two".