621110106 has 20 divisors (see below), whose sum is σ = 1391747082. Its totient is φ = 207036648.

The previous prime is 621110099. The next prime is 621110111. The reversal of 621110106 is 601011126.

It can be written as a sum of positive squares in only one way, i.e., 619263225 + 1846881 = 24885^2 + 1359^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

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 9 ways as a sum of consecutive naturals, for example, 1916845 + ... + 1917168.

Almost surely, 2^621110106 is an apocalyptic number.

621110106 is an abundant number, since it is smaller than the sum of its proper divisors (770636976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621110106 is a wasteful number, since it uses less digits than its factorization.

621110106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3834027 (or 3834018 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 621110106 is about 24922.0806916277. The cubic root of 621110106 is about 853.2105139737.

The spelling of 621110106 in words is "six hundred twenty-one million, one hundred ten thousand, one hundred six".