2144155081 has 2 divisors, whose sum is σ = 2144155082. Its totient is φ = 2144155080.

The previous prime is 2144155067. The next prime is 2144155109. The reversal of 2144155081 is 1805514412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1314715081 + 829440000 = 36259^2 + 28800^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144155081 - 2⁷ = 2144154953 is a prime.

It is a super-2 number, since 2×2144155081² = 9194802022756233122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2144155031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072077540 + 1072077541.

It is an arithmetic number, because the mean of its divisors is an integer number (1072077541).

Almost surely, 2^2144155081 is an apocalyptic number.

It is an amenable number.

2144155081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2144155081 is an equidigital number, since it uses as much as digits as its factorization.

2144155081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 2144155081 is about 46305.0222006210. The cubic root of 2144155081 is about 1289.4922347106.

Adding to 2144155081 its reverse (1805514412), we get a palindrome (3949669493).

The spelling of 2144155081 in words is "two billion, one hundred forty-four million, one hundred fifty-five thousand, eighty-one".