144244681 has 6 divisors (see below), whose sum is σ = 167794890. Its totient is φ = 123638256.

The previous prime is 144244679. The next prime is 144244691. The reversal of 144244681 is 186442441.

It can be written as a sum of positive squares in only one way, i.e., 98803600 + 45441081 = 9940^2 + 6741^2 .

It is not a de Polignac number, because 144244681 - 2¹ = 144244679 is a prime.

It is a super-2 number, since 2×144244681² = 41613055993583522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144244631) 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, 1471836 + ... + 1471933.

It is an arithmetic number, because the mean of its divisors is an integer number (27965815).

Almost surely, 2^144244681 is an apocalyptic number.

It is an amenable number.

144244681 is a deficient number, since it is larger than the sum of its proper divisors (23550209).

144244681 is an equidigital number, since it uses as much as digits as its factorization.

144244681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2943783 (or 2943776 counting only the distinct ones).

The product of its digits is 24576, while the sum is 34.

The square root of 144244681 is about 12010.1907145557. The cubic root of 144244681 is about 524.4449838287. Note that the first 3 decimals are identical.

The spelling of 144244681 in words is "one hundred forty-four million, two hundred forty-four thousand, six hundred eighty-one".