2163538 has 24 divisors (see below), whose sum is σ = 3629988. Its totient is φ = 965952.

The previous prime is 2163527. The next prime is 2163547. The reversal of 2163538 is 8353612.

It can be written as a sum of positive squares in 6 ways, for example, as 1247689 + 915849 = 1117^2 + 957^2 .

It is a d-powerful number, because it can be written as 2⁵ + 1 + 6⁶ + 3² + 5 + 3⁹ + 8⁷ .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12420 + ... + 12592.

2^2163538 is an apocalyptic number.

2163538 is a deficient number, since it is larger than the sum of its proper divisors (1466450).

2163538 is a wasteful number, since it uses less digits than its factorization.

2163538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238 (or 225 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 2163538 is about 1470.8970052318. The cubic root of 2163538 is about 129.3366205870.

It can be divided in two parts, 2163 and 538, that added together give a triangular number (2701 = T₇₃).

The spelling of 2163538 in words is "two million, one hundred sixty-three thousand, five hundred thirty-eight".