16243655 has 4 divisors (see below), whose sum is σ = 19492392. Its totient is φ = 12994920.

The previous prime is 16243649. The next prime is 16243663. The reversal of 16243655 is 55634261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55634261 = 19 ⋅2928119.

It is not a de Polignac number, because 16243655 - 2¹⁶ = 16178119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1624361 + ... + 1624370.

It is an arithmetic number, because the mean of its divisors is an integer number (4873098).

Almost surely, 2^16243655 is an apocalyptic number.

16243655 is a deficient number, since it is larger than the sum of its proper divisors (3248737).

16243655 is an equidigital number, since it uses as much as digits as its factorization.

16243655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248736.

The product of its digits is 21600, while the sum is 32.

The square root of 16243655 is about 4030.3417969200. The cubic root of 16243655 is about 253.2568800151.

The spelling of 16243655 in words is "sixteen million, two hundred forty-three thousand, six hundred fifty-five".