144221131 has 2 divisors, whose sum is σ = 144221132. Its totient is φ = 144221130.

The previous prime is 144221117. The next prime is 144221167. The reversal of 144221131 is 131122441.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144221131 is a prime.

It is a super-3 number, since 3×144221131³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 144221099 and 144221108.

It is not a weakly prime, because it can be changed into another prime (144221101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72110565 + 72110566.

It is an arithmetic number, because the mean of its divisors is an integer number (72110566).

Almost surely, 2^144221131 is an apocalyptic number.

144221131 is a deficient number, since it is larger than the sum of its proper divisors (1).

144221131 is an equidigital number, since it uses as much as digits as its factorization.

144221131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192, while the sum is 19.

The square root of 144221131 is about 12009.2102571318. The cubic root of 144221131 is about 524.4164412359.

Adding to 144221131 its reverse (131122441), we get a palindrome (275343572).

The spelling of 144221131 in words is "one hundred forty-four million, two hundred twenty-one thousand, one hundred thirty-one".