144550531221 has 16 divisors (see below), whose sum is σ = 194402064000. Its totient is φ = 95536507968.

The previous prime is 144550531217. The next prime is 144550531241. The reversal of 144550531221 is 122135055441.

It is not a de Polignac number, because 144550531221 - 2² = 144550531217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144550531241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271686 + ... + 602423.

It is an arithmetic number, because the mean of its divisors is an integer number (12150129000).

Almost surely, 2^144550531221 is an apocalyptic number.

It is an amenable number.

144550531221 is a deficient number, since it is larger than the sum of its proper divisors (49851532779).

144550531221 is a wasteful number, since it uses less digits than its factorization.

144550531221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874588.

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 144550531221 its reverse (122135055441), we get a palindrome (266685586662).

The spelling of 144550531221 in words is "one hundred forty-four billion, five hundred fifty million, five hundred thirty-one thousand, two hundred twenty-one".