2163832581 has 16 divisors (see below), whose sum is σ = 2984306688. Its totient is φ = 1393148400.

The previous prime is 2163832579. The next prime is 2163832591. The reversal of 2163832581 is 1852383612.

It is not a de Polignac number, because 2163832581 - 2¹ = 2163832579 is a prime.

It is a super-2 number, since 2×2163832581² = 9364342877194243122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163832501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21970 + ... + 69356.

It is an arithmetic number, because the mean of its divisors is an integer number (186519168).

Almost surely, 2^2163832581 is an apocalyptic number.

It is an amenable number.

2163832581 is a deficient number, since it is larger than the sum of its proper divisors (820474107).

2163832581 is a wasteful number, since it uses less digits than its factorization.

2163832581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47912.

The product of its digits is 69120, while the sum is 39.

The square root of 2163832581 is about 46517.0138873939. The cubic root of 2163832581 is about 1293.4249035244.

The spelling of 2163832581 in words is "two billion, one hundred sixty-three million, eight hundred thirty-two thousand, five hundred eighty-one".