2102222500 has 135 divisors (see below), whose sum is σ = 5388827367. Its totient is φ = 715260000.

The previous prime is 2102222483. The next prime is 2102222501. The reversal of 2102222500 is 52222012.

The square root of 2102222500 is 45850.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 164814244 + 1937408256 = 12838^2 + 44016^2 .

It is not an unprimeable number, because it can be changed into a prime (2102222501) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 16047435 + ... + 16047565.

Almost surely, 2^2102222500 is an apocalyptic number.

2102222500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

2102222500 is the 45850-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2102222500

2102222500 is an abundant number, since it is smaller than the sum of its proper divisors (3286604867).

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

2102222500 is an equidigital number, since it uses as much as digits as its factorization.

2102222500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The cubic root of 2102222500 is about 1281.0307655824.

Multiplying 2102222500 by its sum of digits (16), we get a square (33635560000 = 183400²).

Adding to 2102222500 its reverse (52222012), we get a palindrome (2154444512).

The spelling of 2102222500 in words is "two billion, one hundred two million, two hundred twenty-two thousand, five hundred".