243534013 has 8 divisors (see below), whose sum is σ = 246153600. Its totient is φ = 240921648.

The previous prime is 243534007. The next prime is 243534017. The reversal of 243534013 is 310435342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243534013 is a prime.

It is a super-3 number, since 3×243534013³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243534017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90120 + ... + 92782.

It is an arithmetic number, because the mean of its divisors is an integer number (30769200).

Almost surely, 2^243534013 is an apocalyptic number.

It is an amenable number.

243534013 is a deficient number, since it is larger than the sum of its proper divisors (2619587).

243534013 is a wasteful number, since it uses less digits than its factorization.

243534013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3611.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 243534013 is about 15605.5763430897. The cubic root of 243534013 is about 624.4819284416.

Adding to 243534013 its reverse (310435342), we get a palindrome (553969355).

The spelling of 243534013 in words is "two hundred forty-three million, five hundred thirty-four thousand, thirteen".