2144451900 has 72 divisors (see below), whose sum is σ = 6214602240. Its totient is φ = 570933440.

The previous prime is 2144451887. The next prime is 2144451923. The reversal of 2144451900 is 91544412.

It is a super-2 number, since 2×2144451900² = 9197347902827220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192277 + ... + 203123.

It is an arithmetic number, because the mean of its divisors is an integer number (86313920).

Almost surely, 2^2144451900 is an apocalyptic number.

2144451900 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 2144451900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3107301120).

2144451900 is an abundant number, since it is smaller than the sum of its proper divisors (4070150340).

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

2144451900 is a wasteful number, since it uses less digits than its factorization.

2144451900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11523 (or 11516 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 2144451900 is about 46308.2271308242. The cubic root of 2144451900 is about 1289.5517341593.

The spelling of 2144451900 in words is "two billion, one hundred forty-four million, four hundred fifty-one thousand, nine hundred".