2145550120 has 64 divisors (see below), whose sum is σ = 5545854720. Its totient is φ = 731787264.

The previous prime is 2145550087. The next prime is 2145550159. The reversal of 2145550120 is 210555412.

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, 34189 + ... + 73891.

It is an arithmetic number, because the mean of its divisors is an integer number (86653980).

Almost surely, 2^2145550120 is an apocalyptic number.

2145550120 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 2145550120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2772927360).

2145550120 is an abundant number, since it is smaller than the sum of its proper divisors (3400304600).

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

2145550120 is a wasteful number, since it uses less digits than its factorization.

2145550120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39914 (or 39910 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 2145550120 is about 46320.0833332584. The cubic root of 2145550120 is about 1289.7718323293.

The spelling of 2145550120 in words is "two billion, one hundred forty-five million, five hundred fifty thousand, one hundred twenty".