2144237891 has 8 divisors (see below), whose sum is σ = 2152084704. Its totient is φ = 2136404160.

The previous prime is 2144237881. The next prime is 2144237993. The reversal of 2144237891 is 1987324412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2144237891 - 2¹⁸ = 2143975747 is a prime.

It is a super-2 number, since 2×2144237891² = 9195512266400255762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2144237831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419471 + ... + 424551.

It is an arithmetic number, because the mean of its divisors is an integer number (269010588).

Almost surely, 2^2144237891 is an apocalyptic number.

2144237891 is a deficient number, since it is larger than the sum of its proper divisors (7846813).

2144237891 is a wasteful number, since it uses less digits than its factorization.

2144237891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6541.

The product of its digits is 96768, while the sum is 41.

The square root of 2144237891 is about 46305.9163714530. The cubic root of 2144237891 is about 1289.5088351077.

The spelling of 2144237891 in words is "two billion, one hundred forty-four million, two hundred thirty-seven thousand, eight hundred ninety-one".