2105612220 has 48 divisors (see below), whose sum is σ = 6021163008. Its totient is φ = 549549120.

The previous prime is 2105612209. The next prime is 2105612273. The reversal of 2105612220 is 222165012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370516 + ... + 376155.

It is an arithmetic number, because the mean of its divisors is an integer number (125440896).

Almost surely, 2^2105612220 is an apocalyptic number.

2105612220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105612220 is an abundant number, since it is smaller than the sum of its proper divisors (3915550788).

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

2105612220 is a wasteful number, since it uses less digits than its factorization.

2105612220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746730 (or 746728 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 2105612220 is about 45886.9504325576. The cubic root of 2105612220 is about 1281.7189267655.

Adding to 2105612220 its reverse (222165012), we get a palindrome (2327777232).

The spelling of 2105612220 in words is "two billion, one hundred five million, six hundred twelve thousand, two hundred twenty".