1144206181 has 2 divisors, whose sum is σ = 1144206182. Its totient is φ = 1144206180.

The previous prime is 1144206157. The next prime is 1144206209. The reversal of 1144206181 is 1816024411.

It is an a-pointer prime, because the next prime (1144206209) can be obtained adding 1144206181 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1089594081 + 54612100 = 33009^2 + 7390^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144206181 - 2¹¹ = 1144204133 is a prime.

It is a super-2 number, since 2×1144206181² = 2618415569277209522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144206781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572103090 + 572103091.

It is an arithmetic number, because the mean of its divisors is an integer number (572103091).

Almost surely, 2^1144206181 is an apocalyptic number.

It is an amenable number.

1144206181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144206181 is an equidigital number, since it uses as much as digits as its factorization.

1144206181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1144206181 is about 33826.1168477849. The cubic root of 1144206181 is about 1045.9271339722.

The spelling of 1144206181 in words is "one billion, one hundred forty-four million, two hundred six thousand, one hundred eighty-one".