243136 has 28 divisors (see below), whose sum is σ = 502920. Its totient is φ = 116480.

The previous prime is 243121. The next prime is 243137. The reversal of 243136 is 631342.

243136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243136² = 118230228992, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1791 + ... + 1921.

2²⁴³¹³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251460).

243136 is an abundant number, since it is smaller than the sum of its proper divisors (259784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243136 is a wasteful number, since it uses less digits than its factorization.

243136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 162 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 243136 is about 493.0882273995. The cubic root of 243136 is about 62.4141541418.

Adding to 243136 its reverse (631342), we get a palindrome (874478).

It can be divided in two parts, 24 and 3136, that added together give a triangular number (3160 = T₇₉).

The spelling of 243136 in words is "two hundred forty-three thousand, one hundred thirty-six".