2144523400 has 48 divisors (see below), whose sum is σ = 4997001600. Its totient is φ = 855919680.

The previous prime is 2144523389. The next prime is 2144523413. The reversal of 2144523400 is 43254412.

It is a happy number.

It is a super-2 number, since 2×2144523400² = 9197961226295120000, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81021 + ... + 104179.

It is an arithmetic number, because the mean of its divisors is an integer number (104104200).

Almost surely, 2^2144523400 is an apocalyptic number.

2144523400 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 2144523400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2498500800).

2144523400 is an abundant number, since it is smaller than the sum of its proper divisors (2852478200).

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

2144523400 is a wasteful number, since it uses less digits than its factorization.

2144523400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23638 (or 23629 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 2144523400 is about 46308.9991254400. Note that the first 3 decimals coincide. The cubic root of 2144523400 is about 1289.5660660148.

Adding to 2144523400 its reverse (43254412), we get a palindrome (2187777812).

The spelling of 2144523400 in words is "two billion, one hundred forty-four million, five hundred twenty-three thousand, four hundred".