622105621 has 4 divisors (see below), whose sum is σ = 630867744. Its totient is φ = 613343500.

The previous prime is 622105577. The next prime is 622105643. The reversal of 622105621 is 126501226.

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 a cyclic number.

It is not a de Polignac number, because 622105621 - 2⁷ = 622105493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (622105681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4380955 + ... + 4381096.

It is an arithmetic number, because the mean of its divisors is an integer number (157716936).

Almost surely, 2^622105621 is an apocalyptic number.

It is an amenable number.

622105621 is a deficient number, since it is larger than the sum of its proper divisors (8762123).

622105621 is an equidigital number, since it uses as much as digits as its factorization.

622105621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8762122.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 622105621 is about 24942.0452449273. The cubic root of 622105621 is about 853.6661124593. Note that the first 3 decimals are identical.

Adding to 622105621 its reverse (126501226), we get a palindrome (748606847).

The spelling of 622105621 in words is "six hundred twenty-two million, one hundred five thousand, six hundred twenty-one".