2106210520 has 64 divisors (see below), whose sum is σ = 4867441920. Its totient is φ = 819794304.

The previous prime is 2106210511. The next prime is 2106210539. The reversal of 2106210520 is 250126012.

It is a super-2 number, since 2×2106210520² = 8872245509117340800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484597 + ... + 488923.

It is an arithmetic number, because the mean of its divisors is an integer number (76053780).

Almost surely, 2^2106210520 is an apocalyptic number.

2106210520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2106210520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2433720960).

2106210520 is an abundant number, since it is smaller than the sum of its proper divisors (2761231400).

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

2106210520 is a wasteful number, since it uses less digits than its factorization.

2106210520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4664 (or 4660 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2106210520 is about 45893.4692521714. The cubic root of 2106210520 is about 1281.8403134427.

Adding to 2106210520 its reverse (250126012), we get a palindrome (2356336532).

The spelling of 2106210520 in words is "two billion, one hundred six million, two hundred ten thousand, five hundred twenty".