2162238891 has 16 divisors (see below), whose sum is σ = 3086877600. Its totient is φ = 1341452288.

The previous prime is 2162238889. The next prime is 2162238907. The reversal of 2162238891 is 1988322612.

It is a cyclic number.

It is not a de Polignac number, because 2162238891 - 2¹ = 2162238889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2162238821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233646 + ... + 242723.

It is an arithmetic number, because the mean of its divisors is an integer number (192929850).

Almost surely, 2^2162238891 is an apocalyptic number.

2162238891 is a deficient number, since it is larger than the sum of its proper divisors (924638709).

2162238891 is a wasteful number, since it uses less digits than its factorization.

2162238891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476478.

The product of its digits is 82944, while the sum is 42.

The square root of 2162238891 is about 46499.8805482337. The cubic root of 2162238891 is about 1293.1072842806.

The spelling of 2162238891 in words is "two billion, one hundred sixty-two million, two hundred thirty-eight thousand, eight hundred ninety-one".