140221013 has 4 divisors (see below), whose sum is σ = 141796620. Its totient is φ = 138645408.

The previous prime is 140220991. The next prime is 140221021. The reversal of 140221013 is 310122041.

140221013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 55249489 + 84971524 = 7433^2 + 9218^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140221013 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 (140221033) 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, 787670 + ... + 787847.

It is an arithmetic number, because the mean of its divisors is an integer number (35449155).

Almost surely, 2^140221013 is an apocalyptic number.

It is an amenable number.

140221013 is a deficient number, since it is larger than the sum of its proper divisors (1575607).

140221013 is an equidigital number, since it uses as much as digits as its factorization.

140221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1575606.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 140221013 is about 11841.4953869855. The cubic root of 140221013 is about 519.5225066927.

Adding to 140221013 its reverse (310122041), we get a palindrome (450343054).

The spelling of 140221013 in words is "one hundred forty million, two hundred twenty-one thousand, thirteen".