2140211309 has 2 divisors, whose sum is σ = 2140211310. Its totient is φ = 2140211308.

The previous prime is 2140211279. The next prime is 2140211323. The reversal of 2140211309 is 9031120412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1728730084 + 411481225 = 41578^2 + 20285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2140211309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2140211399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1070105654 + 1070105655.

It is an arithmetic number, because the mean of its divisors is an integer number (1070105655).

Almost surely, 2^2140211309 is an apocalyptic number.

It is an amenable number.

2140211309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2140211309 is an equidigital number, since it uses as much as digits as its factorization.

2140211309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 2140211309 is about 46262.4178896867. The cubic root of 2140211309 is about 1288.7011562848.

The spelling of 2140211309 in words is "two billion, one hundred forty million, two hundred eleven thousand, three hundred nine".