2145220000 has 360 divisors, whose sum is σ = 6730970400. Its totient is φ = 665280000.

The previous prime is 2145219977. The next prime is 2145220009. The reversal of 2145220000 is 225412.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (2145220009) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 10779901 + ... + 10780099.

It is an arithmetic number, because the mean of its divisors is an integer number (18697140).

Almost surely, 2^2145220000 is an apocalyptic number.

2145220000 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 2145220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3365485200).

2145220000 is an abundant number, since it is smaller than the sum of its proper divisors (4585750400).

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

2145220000 is a wasteful number, since it uses less digits than its factorization.

2145220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 224 counting only the distinct ones).

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

The square root of 2145220000 is about 46316.5197310851. The cubic root of 2145220000 is about 1289.7056797045.

Adding to 2145220000 its reverse (225412), we get a palindrome (2145445412).

The spelling of 2145220000 in words is "two billion, one hundred forty-five million, two hundred twenty thousand".