144400335221 has 4 divisors (see below), whose sum is σ = 144537991500. Its totient is φ = 144262678944.

The previous prime is 144400335109. The next prime is 144400335227. The reversal of 144400335221 is 122533004441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127084407121 + 17315928100 = 356489^2 + 131590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144400335221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144400335227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68826566 + ... + 68828663.

It is an arithmetic number, because the mean of its divisors is an integer number (36134497875).

Almost surely, 2^144400335221 is an apocalyptic number.

It is an amenable number.

144400335221 is a deficient number, since it is larger than the sum of its proper divisors (137656279).

144400335221 is a wasteful number, since it uses less digits than its factorization.

144400335221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137656278.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 144400335221 its reverse (122533004441), we get a palindrome (266933339662).

The spelling of 144400335221 in words is "one hundred forty-four billion, four hundred million, three hundred thirty-five thousand, two hundred twenty-one".