140221511 has 2 divisors, whose sum is σ = 140221512. Its totient is φ = 140221510.

The previous prime is 140221489. The next prime is 140221519. The reversal of 140221511 is 115122041.

140221511 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 is a cyclic number.

It is not a de Polignac number, because 140221511 - 2⁶ = 140221447 is a prime.

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 140221511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140221519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70110755 + 70110756.

It is an arithmetic number, because the mean of its divisors is an integer number (70110756).

Almost surely, 2^140221511 is an apocalyptic number.

140221511 is a deficient number, since it is larger than the sum of its proper divisors (1).

140221511 is an equidigital number, since it uses as much as digits as its factorization.

140221511 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 140221511 is about 11841.5164147165. The cubic root of 140221511 is about 519.5231217263.

Adding to 140221511 its reverse (115122041), we get a palindrome (255343552).

The spelling of 140221511 in words is "one hundred forty million, two hundred twenty-one thousand, five hundred eleven".