2162021539 has 2 divisors, whose sum is σ = 2162021540. Its totient is φ = 2162021538.

The previous prime is 2162021531. The next prime is 2162021549. The reversal of 2162021539 is 9351202612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2162021539 - 2³ = 2162021531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2162021539.

It is not a weakly prime, because it can be changed into another prime (2162021531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1081010769 + 1081010770.

It is an arithmetic number, because the mean of its divisors is an integer number (1081010770).

Almost surely, 2^2162021539 is an apocalyptic number.

2162021539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2162021539 is an equidigital number, since it uses as much as digits as its factorization.

2162021539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 2162021539 is about 46497.5433652145. The cubic root of 2162021539 is about 1293.0639543671.

The spelling of 2162021539 in words is "two billion, one hundred sixty-two million, twenty-one thousand, five hundred thirty-nine".