243318013 has 8 divisors (see below), whose sum is σ = 249546240. Its totient is φ = 237133680.

The previous prime is 243318011. The next prime is 243318029. The reversal of 243318013 is 310813342.

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

It is a cyclic number.

It is not a de Polignac number, because 243318013 - 2¹ = 243318011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243318011) 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, 403 + ... + 22063.

It is an arithmetic number, because the mean of its divisors is an integer number (31193280).

Almost surely, 2^243318013 is an apocalyptic number.

It is an amenable number.

243318013 is a deficient number, since it is larger than the sum of its proper divisors (6228227).

243318013 is a wasteful number, since it uses less digits than its factorization.

243318013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21947.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 243318013 is about 15598.6542047704. The cubic root of 243318013 is about 624.2972478793.

The spelling of 243318013 in words is "two hundred forty-three million, three hundred eighteen thousand, thirteen".