243513424 has 160 divisors (see below), whose sum is σ = 631388160. Its totient is φ = 88128000.

The previous prime is 243513421. The next prime is 243513427. The reversal of 243513424 is 424315342.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (243513421) and next prime (243513427).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 243513392 and 243513401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243513421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2364157 + ... + 2364259.

It is an arithmetic number, because the mean of its divisors is an integer number (3946176).

Almost surely, 2^243513424 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 243513424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315694080).

243513424 is an abundant number, since it is smaller than the sum of its proper divisors (387874736).

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

243513424 is a wasteful number, since it uses less digits than its factorization.

243513424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 243 counting only the distinct ones).

The product of its digits is 11520, while the sum is 28.

The square root of 243513424 is about 15604.9166611040. The cubic root of 243513424 is about 624.4643295026.

Adding to 243513424 its reverse (424315342), we get a palindrome (667828766).

The spelling of 243513424 in words is "two hundred forty-three million, five hundred thirteen thousand, four hundred twenty-four".