2144002981 has 2 divisors, whose sum is σ = 2144002982. Its totient is φ = 2144002980.

The previous prime is 2144002967. The next prime is 2144003027. The reversal of 2144002981 is 1892004412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1549130881 + 594872100 = 39359^2 + 24390^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144002981 - 2⁷ = 2144002853 is a prime.

It is a super-2 number, since 2×2144002981² = 9193497565073772722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2144042981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072001490 + 1072001491.

It is an arithmetic number, because the mean of its divisors is an integer number (1072001491).

Almost surely, 2^2144002981 is an apocalyptic number.

It is an amenable number.

2144002981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144002981 is an equidigital number, since it uses as much as digits as its factorization.

2144002981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 2144002981 is about 46303.3798010469. The cubic root of 2144002981 is about 1289.4617430718.

The spelling of 2144002981 in words is "two billion, one hundred forty-four million, two thousand, nine hundred eighty-one".