2144204391 has 16 divisors (see below), whose sum is σ = 3284471808. Its totient is φ = 1218842400.

The previous prime is 2144204389. The next prime is 2144204431. The reversal of 2144204391 is 1934024412.

It is not a de Polignac number, because 2144204391 - 2¹ = 2144204389 is a prime.

It is a super-2 number, since 2×2144204391² = 9195224940767361762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144204341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263280 + ... + 271301.

It is an arithmetic number, because the mean of its divisors is an integer number (205279488).

Almost surely, 2^2144204391 is an apocalyptic number.

2144204391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2144204391 is a deficient number, since it is larger than the sum of its proper divisors (1140267417).

2144204391 is a wasteful number, since it uses less digits than its factorization.

2144204391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534782.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 2144204391 is about 46305.5546452043. The cubic root of 2144204391 is about 1289.5021196260.

The spelling of 2144204391 in words is "two billion, one hundred forty-four million, two hundred four thousand, three hundred ninety-one".