140016221 has 2 divisors, whose sum is σ = 140016222. Its totient is φ = 140016220.

The previous prime is 140016209. The next prime is 140016223. The reversal of 140016221 is 122610041.

140016221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125193721 + 14822500 = 11189^2 + 3850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140016221 is a prime.

Together with 140016223, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140016221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140016223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70008110 + 70008111.

It is an arithmetic number, because the mean of its divisors is an integer number (70008111).

Almost surely, 2^140016221 is an apocalyptic number.

It is an amenable number.

140016221 is a deficient number, since it is larger than the sum of its proper divisors (1).

140016221 is an equidigital number, since it uses as much as digits as its factorization.

140016221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 140016221 is about 11832.8450087035. The cubic root of 140016221 is about 519.2694635646.

Adding to 140016221 its reverse (122610041), we get a palindrome (262626262).

The spelling of 140016221 in words is "one hundred forty million, sixteen thousand, two hundred twenty-one".