2144394825 has 24 divisors (see below), whose sum is σ = 3605498400. Its totient is φ = 1124290560.

The previous prime is 2144394803. The next prime is 2144394851. The reversal of 2144394825 is 5284934412.

It is a happy number.

It is not a de Polignac number, because 2144394825 - 2⁹ = 2144394313 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 237880 + ... + 246729.

It is an arithmetic number, because the mean of its divisors is an integer number (150229100).

Almost surely, 2^2144394825 is an apocalyptic number.

2144394825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2144394825 is a deficient number, since it is larger than the sum of its proper divisors (1461103575).

2144394825 is a wasteful number, since it uses less digits than its factorization.

2144394825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484681 (or 484676 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 2144394825 is about 46307.6108755354. The cubic root of 2144394825 is about 1289.5402935020.

The spelling of 2144394825 in words is "two billion, one hundred forty-four million, three hundred ninety-four thousand, eight hundred twenty-five".