40144242221 has 8 divisors (see below), whose sum is σ = 42509276280. Its totient is φ = 37779609088.

The previous prime is 40144242209. The next prime is 40144242223. The reversal of 40144242221 is 12224244104.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 34173589321 + 5970652900 = 184861^2 + 77270^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40144242221 - 2⁶ = 40144242157 is a prime.

It is a super-2 number, since 2×40144242221² (a number of 22 digits) 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 (40144242223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119735 + ... + 307611.

It is an arithmetic number, because the mean of its divisors is an integer number (5313659535).

Almost surely, 2^40144242221 is an apocalyptic number.

It is an amenable number.

40144242221 is a deficient number, since it is larger than the sum of its proper divisors (2365034059).

40144242221 is a wasteful number, since it uses less digits than its factorization.

40144242221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200463.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 40144242221 its reverse (12224244104), we get a palindrome (52368486325).

The spelling of 40144242221 in words is "forty billion, one hundred forty-four million, two hundred forty-two thousand, two hundred twenty-one".