140216321 has 8 divisors (see below), whose sum is σ = 160410624. Its totient is φ = 120062880.

The previous prime is 140216287. The next prime is 140216353. The reversal of 140216321 is 123612041.

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

It is not a de Polignac number, because 140216321 - 2²⁶ = 73107457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140216293 and 140216302.

It is not an unprimeable number, because it can be changed into a prime (140216521) 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, 2465 + ... + 16926.

It is an arithmetic number, because the mean of its divisors is an integer number (20051328).

Almost surely, 2^140216321 is an apocalyptic number.

It is an amenable number.

140216321 is a deficient number, since it is larger than the sum of its proper divisors (20194303).

140216321 is a wasteful number, since it uses less digits than its factorization.

140216321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20431.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 140216321 is about 11841.2972684584. The cubic root of 140216321 is about 519.5167119673.

Adding to 140216321 its reverse (123612041), we get a palindrome (263828362).

The spelling of 140216321 in words is "one hundred forty million, two hundred sixteen thousand, three hundred twenty-one".