2154005500 has 48 divisors (see below), whose sum is σ = 4721397408. Its totient is φ = 858480000.

The previous prime is 2154005467. The next prime is 2154005563. The reversal of 2154005500 is 55004512.

It is a congruent number.

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, 132835 + ... + 148165.

It is an arithmetic number, because the mean of its divisors is an integer number (98362446).

Almost surely, 2^2154005500 is an apocalyptic number.

2154005500 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 2154005500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2360698704).

2154005500 is an abundant number, since it is smaller than the sum of its proper divisors (2567391908).

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

2154005500 is a wasteful number, since it uses less digits than its factorization.

2154005500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15631 (or 15619 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 2154005500 is about 46411.2647963832. The cubic root of 2154005500 is about 1291.4638950977.

It can be divided in two parts, 215400 and 5500, that added together give a square (220900 = 470²).

The spelling of 2154005500 in words is "two billion, one hundred fifty-four million, five thousand, five hundred".