2151044500 has 96 divisors (see below), whose sum is σ = 5250510720. Its totient is φ = 763040000.

The previous prime is 2151044491. The next prime is 2151044507. The reversal of 2151044500 is 54401512.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151044507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 220731 + ... + 230269.

It is an arithmetic number, because the mean of its divisors is an integer number (54692820).

Almost surely, 2^2151044500 is an apocalyptic number.

2151044500 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 2151044500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2625255360).

2151044500 is an abundant number, since it is smaller than the sum of its proper divisors (3099466220).

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

2151044500 is a wasteful number, since it uses less digits than its factorization.

2151044500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9610 (or 9598 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2151044500 is about 46379.3542430250. The cubic root of 2151044500 is about 1290.8718541825.

The spelling of 2151044500 in words is "two billion, one hundred fifty-one million, forty-four thousand, five hundred".