2144004731 has 18 divisors (see below), whose sum is σ = 2449062252. Its totient is φ = 1861280520.

The previous prime is 2144004703. The next prime is 2144004739. The reversal of 2144004731 is 1374004412.

It is a de Polignac number, because none of the positive numbers 2^k-2144004731 is a prime.

It is a super-2 number, since 2×2144004731² = 9193512573100764722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2144004731.

It is not an unprimeable number, because it can be changed into a prime (2144004739) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3531830 + ... + 3532436.

It is an arithmetic number, because the mean of its divisors is an integer number (136059014).

Almost surely, 2^2144004731 is an apocalyptic number.

2144004731 is a deficient number, since it is larger than the sum of its proper divisors (305057521).

2144004731 is an frugal number, since it uses more digits than its factorization.

2144004731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 2144004731 is about 46303.3986981517. The cubic root of 2144004731 is about 1289.4620939043.

The spelling of 2144004731 in words is "two billion, one hundred forty-four million, four thousand, seven hundred thirty-one".