144251181 has 6 divisors (see below), whose sum is σ = 208362830. Its totient is φ = 96167448.

The previous prime is 144251143. The next prime is 144251203. The reversal of 144251181 is 181152441.

It is a happy number.

144251181 is a `hidden beast` number, since 144 + 2 + 511 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 122544900 + 21706281 = 11070^2 + 4659^2 .

It is not a de Polignac number, because 144251181 - 2⁶ = 144251117 is a prime.

It is a super-2 number, since 2×144251181² = 41616806439789522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144251881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8013946 + ... + 8013963.

Almost surely, 2^144251181 is an apocalyptic number.

It is an amenable number.

144251181 is a deficient number, since it is larger than the sum of its proper divisors (64111649).

144251181 is a wasteful number, since it uses less digits than its factorization.

144251181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16027915 (or 16027912 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 144251181 is about 12010.4613150370. The cubic root of 144251181 is about 524.4528612796.

The spelling of 144251181 in words is "one hundred forty-four million, two hundred fifty-one thousand, one hundred eighty-one".