2145222300 has 144 divisors (see below), whose sum is σ = 6798314880. Its totient is φ = 519048960.

The previous prime is 2145222293. The next prime is 2145222337. The reversal of 2145222300 is 32225412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 225439 + ... + 234761.

It is an arithmetic number, because the mean of its divisors is an integer number (47210520).

Almost surely, 2^2145222300 is an apocalyptic number.

2145222300 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 2145222300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3399157440).

2145222300 is an abundant number, since it is smaller than the sum of its proper divisors (4653092580).

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

2145222300 is a wasteful number, since it uses less digits than its factorization.

2145222300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412 (or 9405 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 2145222300 is about 46316.5445602325. The cubic root of 2145222300 is about 1289.7061406242.

Adding to 2145222300 its reverse (32225412), we get a palindrome (2177447712).

The spelling of 2145222300 in words is "two billion, one hundred forty-five million, two hundred twenty-two thousand, three hundred".