2154544000 has 128 divisors (see below), whose sum is σ = 6122301120. Its totient is φ = 738662400.

The previous prime is 2154543997. The next prime is 2154544057. The reversal of 2154544000 is 4454512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102382 + ... + 121618.

Almost surely, 2^2154544000 is an apocalyptic number.

2154544000 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 2154544000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3061150560).

2154544000 is an abundant number, since it is smaller than the sum of its proper divisors (3967757120).

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

2154544000 is an equidigital number, since it uses as much as digits as its factorization.

2154544000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19273 (or 19251 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 2154544000 is about 46417.0658271287. The cubic root of 2154544000 is about 1291.5715078469.

Adding to 2154544000 its reverse (4454512), we get a palindrome (2158998512).

The spelling of 2154544000 in words is "two billion, one hundred fifty-four million, five hundred forty-four thousand".